Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen.

If things seem under control, you are just not going fast enough.

Great is he, who conquers the frightful. Sublime is he, who, while succumbing to it, fears it not.

We doctors know a hopeless case if—listen: there's a hell of a good universe next door.

When there is silence one finds the anchor of the universe within oneself.

Listening, not imitation, may be the sincerest form of flattery.

Teach your child to hold his tongue; he'll learn fast enough to speak.

When angry, count to ten before you speak; if very angry, one hundred.

People who know what they’re talking about don’t need PowerPoint.

Understanding a question is half an answer.

We know how to speak many falsehoods which resemble real things, but we know, when we will, how to speak true things.

The thought of only being a creature of the present and the past was troubling. I longed for a future, too, with hope in it. The desire to be free, awakened my determination to act, to think, and to speak.

It is absurd to hold that a man ought to be ashamed of being unable to defend himself with his limbs, but not of being unable to defend himself with speech and reason.

We shall soon be in a world in which a man may be howled down for saying that two and two make four, in which people will persecute the heresy of calling a triangle a three-sided figure, and hang a man for maddening a mob with the news that grass is green.

Truly, to tell lies is not honorable; but when the truth entails tremendous ruin, to speak dishonorably is pardonable.

Should I keep back my opinions at such a time, through fear of giving offense, I should consider myself as guilty of treason towards my country, and of an act of disloyalty toward the Majesty of Heaven, which I revere above all earthly kings.