No matter what people tell you, words and ideas can change the world.

I long to accomplish a great and noble task; but it is my chief duty to accomplish small tasks as if they were great and noble

Do not be afraid. Do not be satisfied with mediocrity. Put out into the deep and let down your nets for a catch.

The one excellent thing that can be learned from a lion is that whatever a man intends doing should be done by him with a whole-hearted and strenuous effort.

The unexamined life is not worth living.

A man can't soar too high, when he flies with his own wings.

Things may come to those who wait but only the things left by those who hustle.

The key to immortality is first living a life worth remembering.

Nothing is impossible, the word itself says 'I am possible'

We're lost, but we're making good time

We are all in the gutter, but some of us are looking at the stars.

Don't wish it were easier, wish you were better.

All wealth is the product of labor.

Our greatest glory is not in never falling but in rising every time we fall.

Only those are fit to live who do not fear to die; and none are fit to die who have shrunk from the joy of life and the duty of life. Both life and death are parts of the same Great Adventure.

The limits of the possible can only be defined by going beyond them into the impossible.

He was a dreamer, a thinker, a speculative philosopher... or, as his wife would have it, an idiot.

If you get up in the morning and think the future is going to be better, it is a bright day. Otherwise, it's not.

Human dignity consists in the role we must play in our own perfection. Taking a role in our own self-completion is the highest expression of our creativity.

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

How wrong is it for a woman to expect the man to build the world she wants, rather than to create it herself?