The ordinary adult never gives a thought to space-time problems ... I, on the contrary, developed so slowly that I did not begin to wonder about space and time until I was an adult. I then delved more deeply into the problem than any other adult or child would have done.

One should not pursue goals that are easily achieved. One must develop an instinct for what one can just barely achieve through one’s greatest efforts.

Nothing truly valuable can be achieved except by the unselfish cooperation of many individuals.

One scientific epoch ended and another began with James Clerk Maxwell.

One always likes to do the things for which one has ability.

Student: Dr. Einstein, Aren't these the same questions as last year's [physics] final exam? Dr. Einstein: Yes; But this year the answers are different.

In the midst of every crisis, lies great opportunity.