He's got a dual personality - usually a quiet "nice guy" type, but when he flips, his character changes.

Why not just let fly once in a while?

Oh man! Aki in a china dress was so cute. I almost lost it then.

Love is beyond reason.

A man of reason could answer the question.

No rational person, of whatever political persuasion, could possibly object to the program.

Men who were bereft of reason conducted the war.

Human beings differ from other animals in that they have reason.

Do not resort to the sword but appeal to reason.

There is eloquence in screaming.

He is a man of reason.

He is able to subordinate passion to reason.

He lost his reason when he saw his house burn down.

Sudden misfortune deprived her of her reason.

Animals have no reason.

Anger deprived him of his reason.

Man is a rational animal.

Man is a rational being.

Man has reason, animals do not.

In asking voters to approve the new tax, the President appealed to reason.