The world's great men have not commonly been great scholars, nor its great scholars great men.

• education
• greatness
• intellect

If a man really loves a woman, of course he wouldn't marry her for the world if he were not quite sure that he was the best person she could by any possibility marry.

• marriage
• love

To reach the port of heaven, we must sail, sometimes with the wind, sometimes against it - but we must sail, and not drift, nor lie at anchor.

• initiative

The great thing in this world is not so much where you stand, as in what direction you are moving.

• purpose
• direction

Knowledge and timber shouldn't be much used till they are seasoned.

• knowledge
• wisdom

Many ideas grow better when transplanted into another mind than in the one where they sprang up.

• ideas

Pretty much all the honest truth telling there is in the world is done by children.

• honesty
• truth
• children

The right to swing my fist ends where the other man's nose begins.

• rights

Man's mind, once stretched by a new idea, never regains its original dimensions.

• mind
• ideas

To have doubted one's own first principles is the mark of a civilized man.

• principle
• doubt