We can't encourage narrow mindedness, for no nation can be great whose people are narrow in thought.

It is science alone that can solve the problems of hunger and poverty, of insanitation and illiteracy, of superstition and deadening custom and tradition, of vast resources running to waste, or a rich country inhabited by starving people... Who indeed could afford to ignore science today? At every turn we have to seek its aid... The future belongs to science and those who make friends with science.

There is nothing more horrifying than stupidity in action.

The person who talks most of his own virtue is often the least virtuous.

A country is known by the way it treats its animals

What we really are matters more than what other people think of us.

Action to be effective must be directed to clearly conceived ends.