Nobody doubts that he exists, though he may doubt the existence of God. If he finds out the truth about himself and discovers his own source, this is all that is required.
Ramana MaharshiIt is enough that one surrenders oneself. Surrender is giving oneself up to the original cause of one's being. Do not delude yourself by imagining this source to be some God outside you. One's source is within oneself. Give yourself up to it. That means that you should seek the source and merge in it.
Ramana Maharshi