Love: I recognize the emotion for what it is, an irrational self-destructive impulse, which is disguised as joy.

I am even grateful to Einstein and others because through their erroneous theories they lead mankind away from that dangerous path I followed.

The human mind thinks but to complicate. As soon as one problem is solved, that solution introduces new complications, other problems that perhaps did not exist before. That was one of my great troubles when I was younger, I invented many things that were very fine, but always I was getting into complications. I have had to work very hard to overcome that.

There is no energy in matter other than that received from the environment

The present is theirs; the future, for which I really worked, is mine.

The mind is sharper and keener in seclusion and uninterrupted solitude. Originality thrives in seclusion free of outside influences beating upon us to cripple the creative mind. Be alone-that is the secret of invention: be alone, that is when ideas are born.

Of all the frictional resistances, the one that most retards human movement is ignorance.