“It is my business to know what other people do not know.”

It is a mistake to confound strangeness with mystery.

When once your point of view is changed, the very thing which was so damning becomes a clue to the truth.

My mind rebels at stagnation, give me problems, give me work!

The larger crimes are apt to be the simpler, for the bigger the crime, the more obvious, as a rule, is the motive.

What one man can invent, another can discover.

I cannot agree with those who rank modesty among the virtues.

The grand thing is to be able to reason backwards.

I get in the dumps at times, and don’t open my mouth for days on end. You must not think I am sulky when I do that. Just let me alone, and I’ll soon be right.

It is, I admit, mere imagination; but how often is imagination the mother of truth?

We balance probabilities and choose the most likely. It is the scientific use of the imagination.

There are no fools so troublesome as those who have some wit.

There’s a light in a woman’s eyes that speaks louder than words.

Of all ghosts the ghosts of our old loves are the worst.

When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth.

I wanted to end the world, but I’ll settle for ending yours.

It’s every man’s business to see justice done.

Change your opinions, keep to your principles; change your leaves, keep intact your roots.

You have to do everything possible to win no matter what.

Haters will broadcast your failures, but whisper your success.

Your brand name is only as good as your reputation.

What really motivates people at Facebook is building stuff that they’re proud of.

The opportunity will not remain open indefinitely.

The great thing about fact-based decisions is that they overrule the hierarchy.

It’s only when the tide goes out that you discover who’s been swimming naked.