Thay's talk on the second day of the retreat at the YMCA of Hong Kong, November 5th, 2010. "The best kind of grace is understanding. In Christianity we are urged to be still and know. When you have concentration, you are able to know. Nirvana, our true nature of no-birth and no-death, is equal to God. In fact in the Psalms it is said: Be still and know that I am God."