Spiritual attainment is nothing but conviction. A man may think, 'Perhaps it is so'. He may think about the best doctrines or about the highest ideas that there are, but he will still think, 'It is so, perhaps'. There is always 'perhaps' attached to it. But then there is another person who cannot use the word 'perhaps' because he does not think about it. He cannot say, 'It may be so', when he knows that it is so. When a person arrives at the stage when the knowledge of reality becomes a conviction, then there is nothing in the world that will change it. And if there is anything to attain to, it is that conviction which one can never find in the outside world; it must rise from the depths of one's own heart.