There are so many plans, so many schemes, and so many reasons why there should be neither plans nor schemes.

Never apologize for showing feeling. When you do so, you apologize for the truth.

The secret of success is constancy of purpose.

Cleanliness and order are not matters of instinct; they are matters of education, and like most great things, you must cultivate a taste for them.

Nurture your mind with great thoughts, for you will never go any higher than you think.

Action may not always bring happiness; but there is no happiness without action.

Courage is fire, and bullying is smoke.

One secret of success in life is for a man to be ready for his opportunity when it comes.

Time is precious, but truth is more precious than time.

Never complain and never explain.

Finality is not the language of politics.

Man is the only animal that laughs and weeps for he is the only animal that is struck with the difference between what things are and what they ought to be.

Every tax ought to be so contrived as both to take out and to keep out of the pockets of the people as little as possible, over and above what it brings into the public treasury of the State.

It's not just politicians who underestimate us; we underestimate ourselves.

It’s not only for unanswered questions that we seek knowledge but also for the examination of unquestioned answers.

Americans and their desire to be novelists, the American novel should be listed in medical dictionaries alongside Megalomania and Obsessional Neuroses.

I find Jesse Jackson to be religiously, progressively old fashioned.

Republicans are always criticizing President Obama for using the teleprompter. Is that a big deal? After eight years of George Bush, I'm glad we have a president that can read.

Acceptance of the power of God in one's life lays the groundwork for personal commitment to both science and Christianity, which so often have been in conflict.

Christopher Ryan and Cacilda Jetha have written the essential corrective to the evolutionary psychology literature.

Teach what is inside you. Not as it applies to you, to yourself, but as it applies to the other.