What is real Knowledge?

What is the religion that we should not leave? People come and go; every day we see people coming into this world and leaving it. So what is real religion? ? What is real Knowledge? What is the true religion which is within, which we must know and not leave? The real knowledge is within. Guru Nanak said, "The Holy Name is with you while you are sleeping, it is with you while you are sitting, while you are standing." That is the real Name which we must know and meditate on. That alone is real, and other things are our own creation, and they are unreal, non-existent.
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