In moments of great grief, that’s where you look and immerse yourself. You realise you are not immortal, you are not a god, you are part of the natural world and you come to accept that.

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

In order to change the world, you have to get your head together first

Obsession is the wellspring of genius and madness.

Do not pray for an easy life, pray for the strength to endure a difficult one.

The very essence of instinct is that it's followed independently of reason.

You cannot truly listen to anyone and do anything else at the same time.

The only limit to our realization of tomorrow will be our doubts of today.

Energy may be likened to the bending of a crossbow; decision,to the releasing of a trigger.

A good teacher protects his pupils from his own influence.

Above all be of single aim; have a legitimate and useful purpose, and devote yourself unreservedly to it.

A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.

Things which matter most must never be at the mercy of things which matter least.

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

Nothing is more intolerable than to have to admit to yourself your own errors.

In anger we should refrain both from speech and action.

There is geometry in the humming of the strings. There is music in the spacing of the spheres.

If you don't behave as you believe, you will end by believing as you behave.

Between stimulus and response there is a space. In that space is our power to choose our response. In our response lies our growth and our freedom.

We seldom realize, for example that our most private thoughts and emotions are not actually our own. For we think in terms of languages and images which we did not invent, but which were given to us by our society.

There are no limitations to the mind except those we acknowledge.