If you can't explain something simply, you don't know enough about it.

Strive not to be a success, but rather to be of value.

Brief is this existence, as a visit in a strange house. The path to be pursued is poorly lit by a flickering consciousness.

No idea is conceived in our mind independent of our five senses [i.e., no idea is divinely inspired].

Numerous are the academic professors, but rare are wise and noble teachers.

Life is a Mystery, not a problem waiting to be solved.

One has to realize that the powerful industrial groups concerned in the manufacture of arms are doing their best in all countries to prevent the peaceful settlement of international disputes, and that rulers can achieve this great end only if they are sure of the vigorous support of the majority of their peoples.