It is better to be a human being dissatisfied than a pig satisfied； better to be Socrates dissatisfied than a fool satisfied.
"To travel is to discover that everyone is wrong about other countries."
The art of living lies less in eliminating our troubles than in growing with them.
The secret of joy in work is contained in one word – excellence. To know how to do something well is to enjoy it.
In chemistry, as in life, the most profound truths are often the simplest.