Science is the outcome of being prepared to live without certainty and therefore a mark of maturity. It embraces doubt and loose ends.

Man is born free and everywhere he is in chains.

All that happens means something; nothing you do is ever insignificant.

Each life makes its own immitation of immortality.

The love of life is necessary to the vigorous prosecution of any undertaking.

I have no idea what's awaiting me, or what will happen when this all ends. For the moment I know this: there are sick people and they need curing.

We cannot live better than in seeking to become better.

I think the highest and lowest points are the important ones. Anything else is just...in between.

The lessons of the past are ignored and obliterated in a contemporary antagonism known as the generation gap.

If I'm honest I have to tell you I still read fairy-tales and I like them best of all.

A wise girl kisses but doesn't love, listens but doesn't believe, and leaves before she is left.

Do what's right for you, as long as it don't hurt no one

It is not the length of life, but the depth.

The worldly comforts are not for me. I am like a traveller, who takes rest under a tree in the shade and then goes on his way.

Don't be concerned others not appreciating you. Be concerned about your not appreciating others.

Life is pure adventure, and the sooner we realize that, the quicker we will be able to treat life as art.

Open your arms to change, but don't let go of your values.

Life is too short, or too long, for me to allow myself the luxury of living it so badly.

I'd trade all my tomorrows for a single yesterday.

We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.

The only creatures that are evolved enough to convey pure love are dogs and infants.