For what can be known about God is plain to all, because God is plain to all, because God has shown it to them. Ever since creation of the world His invisible nature, namely His eternal power has been clearly perceived in the things that have been made.
Self-knowledge is not a thing to be bought in books, but it is awareness, from moment to moment.
Only by devotional service is the Supreme Truth, Krishna, pleased, and by His inconceivable energy. He can reveal Himself to the heart of the pure devotee.
As the heat of a fire reduces wood to ashes, the fire of knowledge burns to ashes all karma. Nothing in this world purifies like spiritual wisdom. It is the perfection achieved in time through the path of yoga, the path which leads to the Self within.
Realise your oneness with God, remaining continually intent on identifying with its nature, and joyfully drink the bliss of God within, for what use is there in other, empty things?

