Expedients are for the hour, but principles are for the ages.

The principles which men give to themselves end by overwhelming their noblest intentions.

The principles we live by, in business and in social life, are the most important part of happiness.

Principle, particularly moral principal, can never be a weathervane, spinning around this way and that with the shifting winds of expediency. Moral principle is a compass forever fixed and forever true. And that is as important in business as it is in the classroom.

You may be flexible on strategy, but must remain consistent on principle!

Every principle is a judgment, every judgment the outcome of experience, and experience is only acquired by the exercise of the senses; whence it follows that religious principles bear upon nothing whatever and are not in the slightest innate. Ignorance and fear, you will repeat to them, ignorance and fear -- those are the twin bases of every religion.

I find that principles have no real force except when one is well fed.