Knowledge and faith constitute the main and the basic difference between man and other living beings and that knowledge and faith form the basis of man’s humanity which depends on them Source: Man and Faith | Ayatollah Murtada Mutahhari (R)
Every part of Islam is…
Every part of Islam is linked with other parts and all parts constitute an organized unit of theism and human fostering, revealed by the Almighty Allah to His honorable Prophet Source: Islamic Teachings in brief | Allama Tabatabai (R)