Insanity is doing the same thing over and over again and expecting different results.

I trust that everything happens for a reason, even if we are not wise enough to see it.

Strength of mind rests in sobriety; for this keeps your reason unclouded by passion.

You are never too old to become younger!

If I find 10,000 ways something won't work, I haven't failed. I am not discouraged, because every wrong attempt discarded is another step forward.

I'd rather be an optimist and a fool than a pessimist and right.

The secret of genius is to carry the spirit of the child into old age, which means never losing your enthusiasm.

We are what our thoughts have made us; so take care about what you think. Words are secondary. Thoughts live; they travel far.

Fantasy is an exercise bicycle for the mind. It might not take you anywhere, but it tones up the muscles that can. Of course, I could be wrong.

It marks a big step in your development when you come to realize that other people can help you do a better job than you could do alone.

I am as bad as the worst, but, thank God, I am as good as the best.

I hated every minute of training, but I said, 'Don't quit. Suffer now and live the rest of your life as a champion'.

You have to dream before your dreams can come true.

I don’t think we are going to become extinct. We are very clever and very resourceful.

It is better to light one small candle than to curse the darkness.

I don't care what people think or say about me, I know who I am.

We ask ourselves, who am I to be brilliant, gorgeous, handsome, talented and fabulous? Actually, who are you not to be?

Our lives begin to end the day we become silent about things that matter.

No great discovery was ever made without a bold guess.

The people who were trying to make this world worse are not taking the day off. Why should I?

The more you lose yourself in something bigger than yourself, the more energy you will have.