“Knowing grows in the memory, and memory is just mechanical. That's why we now have mechanical devices which can be fed with memory -- we have computers, and a computer is more efficient than any human brain. A computer can do anything that a human brain can do -- and a computer can do many more things which a human brain cannot do. Sooner or later, human memory is going to be replaced by mechanical devices. A mechanical device can do whatsoever your mind is doing, and more efficiently, and in less time. A computer can do a mathematical problem in seconds for which you would need an Einstein, or a person of the caliber of Einstein, to work on for at least three months.

“By being, I mean the consciousness with which you are born. And by mind, I mean all the accumulation that has come to your consciousness through society, through education, through culture. You are not born with a mind; you are born with a consciousness. Mind is a later growth. That's why if a person is not taught, if a person is not educated, then he has a lesser mind, a poor mind. If no language is taught to you, you will know no language. If nothing is taught to you, you will know nothing. Mind is a social growth.”
That Art Thou, Talk #21

“You can forget if someone has helped you, but you cannot forget if someone has harmed you. You can forget something which has been a bliss, but you cannot forget something which has been a suffering. We go on accumulating negatives; these negatives become the impurities for the heart. Everyone goes on accumulating negatives. If someone is friendly to you for years, and for a single moment is not friendly, then all that friendship will go down and that moment of unfriendliness will become the most significant thing -- and you will remember it.
“This attitude must be changed. One must go on accumulating positives and throwing out negatives; then the heart becomes purified. Go on accumulating positives. Never accumulate anything negative; it is not going to help you, it is going to destroy you.”
“On what is one to meditate? -- the untainted, the pure, the clear, and the griefless. “Meditate on the untainted.
“What is untainted? -- only the sky, space is untainted. Meditate on space, pure space, and you will become like it.
Whatsoever one meditates on one becomes.
“Meditate on purity.
“Everyone has felt somewhere a glimpse of purity... a flower, a virgin -- anywhere. Many moments are there when one begins to feel purity. Meditate on purity... a flower, a virgin -- anything. Meditate on purity and you will become pure. Whatsoever one meditates on one becomes.”
That Art Thou, Talk #22