Religion is the belief in what is supernatural, sacred, or divine, and the ethics, customs, and organization related to that belief. There are many different religions in the world and they seem to separate from each other. But what's interesting is that some of the world's major religions have somethings in common.
Khởi Nguyên Lược (The Root Of Faith) is a summary of the origins of three religions: Islam, Judaism and Christianity, from which the origins and commonalities of these religions can be better understood.