The absent are never without fault, nor the present without excuse.

The path to success is to take massive, determined action.

I am a lover of truth, a worshipper of freedom, a celebrant at the altar of language and purity and tolerance.

One who gains strength by overcoming obstacles possesses the only strength which can overcome adversity.

Sometimes you will never know the value of a moment until it becomes a memory.

The wise man should restrain his senses like the crane and accomplish his purpose with due knowledge of his place, time and ability.

I believe that one defines oneself by reinvention. To not be like your parents. To not be like your friends. To be yourself. To cut yourself out of stone.

Science may set limits to knowledge, but should not set limits to imagination.

Better mad with the rest of the world than wise alone.

The essence of knowledge is, having it, to apply it; not having it, to confess your ignorance.

We sometimes congratulate ourselves at the moment of waking from a troubled dream; it may be so the moment after death.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

The greatest power we have is the power of choice.

None but ourselves can free our minds.

All great achievements require time.

Those who know, do. Those that understand, teach.

Science is organized knowledge. Wisdom is organized life.

Experience is the only prophecy of wise men.

Knowledge speaks, but wisdom listens

Think no vice so small that you may commit it, and no virtue so small that you may over look it.

If you do what you've always done, you'll get what you've always gotten.