Swami Vivekananda said this quote

The great secret of true success, of true happiness, is this: the man or woman who asks for no return, the perfectly unselfish person, is the most successful.

~ Swami Vivekananda

Comfort is no test of truth. Truth is often far from being comfortable.

~ Swami Vivekananda

Was there ever a more horrible blasphemy than the statement that all the knowledge of God is confined to this or that book? How dare men call God infinite, and yet try to compress Him within the covers of a little book!

~ Swami Vivekananda

Never say, O Lord, I am a miserable sinner. Who will help you? You are the help of the universe. What in this universe can help you? What can prevail over you? You are the God of the universe; where can you seek for help? Never help came from anywhere but from yourself. In your ignorance, every prayer that you made and that was answered, you thought was answered by some Being, but you answered the prayer yourself unknowingly. The help came from yourself, and you fondly imagined that someone was sending help to you. There is no help for you outside of yourself; you are the creator of the universe. Like the silkworm, you have built a cocoon around yourself. Who will save you? Burst your own cocoon and come out as a beautiful butterfly, as the free soul. Then alone you will see Truth.

~ Swami Vivekananda