No snowflake in an avalanche ever feels responsible.

The universe we observe has precisely the properties we should expect if there is, at bottom, no design, no purpose, no evil, no good, nothing but blind, pitiless indifference

Time is the best killer.

As far as we can discern, the sole purpose of human existence is to kindle a light of meaning in the darkness of mere being.

Wrinkles are engraved smiles.

What is that you express in your eyes? It seems to me more than all the words I have read in my life.

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

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

Science is the most reliable guide for civilization, for life, for success in the world. Searching a guide other than the science is meaning carelessness, ignorance and heresy.

The future is the shape of things to come.

Doing nothing is happiness for children and misery for old men.

Live a balanced life - learn some and think some and draw some and paint some and sing and dance and play and work everyday some.

I desire to live in peace and to continue the life I have begun under the motto 'to live well you must live unseen'

Is it progress if a cannibal uses a fork?

To do a great right do a little wrong.

Life is a succession of lessons which must be lived to be understood.

If man limits himself to a satisfied animal existence, and asks from life only what such an existence can give, the higher values of life at once disappear.

To protect our freedoms, it seems we're going to have to relinquish some of our freedoms for a short period of time.

What would life be if we had no courage to attempt anything?

Old minds are like old horses; you must exercise them if you wish to keep them in working order.

How people treat you is their karma; how you react is yours.