Aristotle on ideas

It is the mark of an educated mind to be able to entertain a thought without accepting it.

Courage is the first of human qualities because it is the quality which guarantees the others.

Man is by nature a political animal.

Great minds discuss ideas. Average minds discuss events. Small minds discuss people.

Eleanor Roosevelt1884–1962

One resists the invasion of armies; one does not resist the invasion of ideas.

Victor Hugo1802–1885

If you have an apple and I have an apple and we exchange these apples then you and I will still each have one apple. But if you have an idea and I have an idea and we exchange these ideas, then each of us will have two ideas.

Charles F. Brannan1903–1992Often credited to George Bernard Shaw