Man's inability to understand and appreciate the thought and viewpoint of another man would be a stumbling block which no amount of mechanical ability could overcome.

No man is the wiser for his learning.

The man who has no imagination has no wings.

The man with no imagination has no wings.

A man who has the knowledge but lacks the power clearly to express it is no better off than if he never had any ideas at all.

The man who has no imagination,has no wing

I notice men themselves have never invented a god capable of understanding them.

The fact that human intuition is ill suited to situations involving uncertainty was known as early as the 1930's, when researchers noted that people could neither make up a sequence of numbers that passed mathematical tests for randomness nor recognize reliably whether a given string was randomly generated.

In the early ages, I believe not much thought was given to what man is and what his real functions should be, and what is the real purpose of his life.

That all men are equal is a proposition which at ordinary times no sane individual has ever given his assent.