Q: What is the proof that Islam is defined as being the five pillars of this religion when considered in detail?
A: The Prophet’s saying (Peace be upon him) upon answering Gabriel when he asked about religion Islam: “Al-Islam implies that you testify that there’s no god but Allah and that Muhammad is the Messenger of Allah, and you establish prayer, pay Zakah, observe the fast of Ramadan, and perform pilgrimage to the House (the Ka’abah in Mecca), if one has means to do so”. ( Reference of Saying:Bukhari and Muslim).

His saying (Peace be upon hi) that reads:”(The superstructure of) Islam is raised on five (pillars): The Oneness of Allah, performance of Prayer, payment of Zakah, fast of Ramadan, and Pilgrimage (to Mecca)”. (Referecne of Saying: Bukhari and Muslim).

Q: When can a deed be an act of worship?
A: If there are two things: perfect love (for Allah) along with perfect subjection (to Him). Allah the Almighty says: {But those who beleive, love Allah more (than anything else)}. (Al-Baqarah, 165).
Allah the Almighty says: {Verily those who live in awe for fear of their lord}. (Al-Mu’minun, 75).
Allah the Almighty gathered the two things in the following verse that reads, {Verily, they used to hasten on to do good deeds, and they used to call on Us with hope and fear, and used to humble themselves for Us}. (Al-Anbiya’, 90).