In Islam, Allah Subhanahu wa Ta'ala end and perfecting other religions to His servants. With Islam as well, Allaah perfected pleasure and be pleased with Islam as a religion. Religion Islam is the true religion and the only religion acceptable to God, faith other than Islam will not be acceptable to God.
"It means: Any person seeking religion other than Islam, it occasionally will not be accepted (the religion) thereof, and in the Hereafter he is among those who lose." [Ali 'Imran: 85]
God Almighty made it compulsory for all men to embrace Islam because the Prophet sallallaahu 'alaihi wa sallam was sent to all mankind, as Allah Almighty says:
"It means: Say: 'O mankind, indeed I am a messenger of Allah unto you all, that is God who has dominion of the heavens and the earth, nothing is right to be worshiped but He, and Yang Yang turned off, then believe in Allah and His Apostle, Prophet Ummi who believe in Allah and to the sentences (His Scriptures) and follow it, that ye may be guided "[al-A'raaf: 158]
It is also in accordance with the words of the Prophet sallallaahu 'alaihi wa sallam.
"It means: For the sake of self-Mohammed is in the hands of God, not to hear one of the nation of the Jews and the Christians who heard the Message of Muhammad, then he dies in a state of not believing in what was sent with it (Islam), he would include the inhabitants of Hell." [1 ]
Believe in the Prophet Muhammad sallallaahu 'alaihi wa sallam, means justify the full acceptance and compliance at all what he was carrying not only justify alone. That is why Abu Talib (uncle of the Prophet sallallaahu 'alaihi wa sallam), including unbelievers, those who do not believe in the Prophet sallallaahu' alaihi wa sallam, although he confirmed what brought by the Prophet sallallaahu 'alaihi wa sallam and he confirmed that Islam is a religion too best.
Religion Islam covers the entire benefit of that is contained in previous religions. Islam has a privilege, that is suitable and appropriate for every age, location and condition of the ummah.
"It means: And We sent down to thee the Qur'an with the truth, confirming what was before, namely the books (which is derived earlier) and the touchstone against which other books ..."[ Al-Maa-Idah: 48]
Islam is said to match and fit in every time, place and condition of the ummah means holding fast to the Islamic Ummah will not eliminate the benefit of even, with this Islamic Ummah will be good, prosperous, safe and Sentausa. But it must be remembered that Islam is not subject to time, place and condition of the ummah as desired by some people. If mankind wants salvation of the world and the Hereafter, then they must convert to Islam and is subject to implement Islamic law.
Religion Islam is the true religion, God promises victory to those who cling to religion is well, but on condition that they should mentauhidkan God, keeping all shirk, syar'i study and practice of charitable deeds.
"It means: He Who has sent His Messenger (with carry) instructions (the Koran) and the true religion to win him over all religion, even though the idolaters do not like it." [At-Tauba : 33]
"It means: And Allah has promised those among you who believe and do righteous deeds, that He who truly will put them in power in the earth, as He will confirm to those who have diridhaiNya religion for them, and He really going to change the (state of) them, after they are in fear of being safe Sentausa. They still worship Me with no associate anything with Me. And anyone who (still) disbelieved after (promise), then they are the people who rebel. "[An-Nuur: 55]
Islam is a religion of perfect in 'Aqeedah and Shari'ah. Form of perfection of which is
. Ordered bertauhid and prohibit shirk.
. Ordered to act honestly and prohibit being a lie.
. Ordered to do justice and act prohibits zhalim.
. Ordered to be trustworthy and prohibit broken a promise.
. Ordered to keep their promises and prohibits being treasonous.. Ordered to devote to the mother-father and disobey them.
In general, Islam ordered that have a certain character is noble, moral good and forbid bad morals. Islam also ordered every good deed, and prohibit the bad deeds
Subahanahu Allah wa Ta'ala says.
"Which means: Verily Allah sent (you) to be fair and do good, giving to kinsfolk, and God forbid from evil deeds, kemungkaran and hostility. He gave the instruction to you that ye may take heed. "[An-Nahl: 90]
Islam is founded upon the Five Principles, as mentioned in a hadith narrated by Ibn 'Umar' Abd-Allaah that the Prophet sallallaahu 'alaihi wa sallam said
"It means: Islam is built upon five things, (ie):
(1) bear witness that there is no right to be worshiped with the right but only God,
(2) and that Muhammad is the Messenger of Allah,
(3) establish prayer,
(4) to pay zakat ,
(5) fasting in Ramadan and perform Hajj to the House. "
Pillars of Islam is obligatory to believe, it is believed and shall be undertaken by every Muslim and Muslimah.
First: no one has the right testimony diibadahi correctly except Allaah and that Muhammad sallallaahu 'alaihi wa sallam is His slave and His Apostle is a solid belief, expressed by the tongue. With that stability, as if she could see it.
Shahadah (testimony) is the one who witnessed it in harmony when there are two things, is because the Prophet sallallaahu 'alaihi wa sallam is to convey the message of Allah Almighty. Thus, the testimony that Muhammad sallallaahu 'alaihi wa sallam is His slave and messenger of Allah Almighty is the perfection of the testimony Laa ilaha illa Allah, no one has the right diibadahi correctly except Allah.
Syahadatain (two testimonies) is a legal basis and the receipt of all charities. Charity will be valid and acceptable if done with sincerity simply because God Almighty and mutaba'ah (follow) the Sunnah Prophet sallallaahu 'alaihi wa sallam. Ikhlas because God Almighty realized in Creed (testimony) laa ilaha illa, no one has the right diibadahi correctly except Allah. While mutaba'ah or follow the Sunnah of the Prophet sallallaahu 'alaihi wa sallam realized in the testimony that Muhammad is His slave and His Messenger.
The biggest benefit of these two sentences creed is to free the heart and soul of servitude to the creature with only worship Allah alone and not to follow but only to the Prophet sallallaahu 'alaihi wa sallam.
Second: Establish the prayer means to worship God by doing the obligatory prayers five times a istiqamah and perfect, either time or how. Prayers must be in accordance with the example of the Prophet sallallaahu 'alaihi wa sallam.As word of the Prophet sallallaahu 'alaihi wa sallam
"It means: pray you, as you see me praying." 
One of the wisdom of prayer is to get a tolerance, sobriety, and to distance themselves from shameful and unjust deeds. 
Third: Remove the zakat means, serve only to God Almighty to deliver the required level of wealth that must be paid zakat. 
One of the lessons out of zakat is to clean up property, life and bad morals, the stinginess and can cover the needs of Islam and Muslims, helping the needy and poor.
Fourth: Ramadan Fasting means worshiping God in a way just to leave things that can cancel the day of Ramadan (fasting month).
One silver lining is to train the soul to leave the things that preferred because seeking pleasure of Allah Almighty.
Fifth: Take the Hajj to the House (the house of God), which means that worship to God by going to al-Bait ul Haram (Ka'bah in Makkah al-Mukarramah) for working syiar or rituals of Hajj. 
One lesson is to train people to exert all their wealth and life skills in order to remain obedient to God Almighty. Therefore Hajj is one of the kinds of jihad fi sabilillah. 
[Copied from the book Sharh Aqidah Ahlus Sunnah Wal Jama By Yazid bin Abdul Qadir Jawas, Publishers Library At-Taqwa, Po Box 264 Bogor 16001, First Matter Jumadil End 1425H/Agustus 2004M]_________
Foote Notes. HR. Muslim (I/134, no. 153), from the companions of Abu Hurayrah
. Mutafaqun 'alaihi. HR. Al-Bukhari in the chapter Qaulu ul Iman Prophet sallallaahu 'alaihi wa sallm: (Èõäöíó ÇúáÅöÓúáÇóãõ Úóáóì ÎóãúÓò) no. 8, ul Muslim Faith chapter in Islamic Arkanul no. 16, Ahmad (II/26, 93, 120, 143), at-Tirmidhi (no. 2609) and an-Nasa-i (VIII/107)
. HR. Al-Bukhari (no. 631), from the Companions of Malik bin Khuwairits radi 'anhu
. See QS. Al-Ankabut: 45.
. See QS. Al-Baqarah: 43.. See QS. Ali 'Imran: 96.. Summarized and supplemented from kutaib Syarhu Ushuulil Iimaan by Shaykh Muhammad ibn Saalih al-Uthaymeen (pp. 40-10)