Little minds have little worries; big minds have no time for worries.
Science does not know its debt to imagination.
Happiness is a perfume which you cannot pour on others without getting some on yourself.
The faith that stands on authority is not faith.
Nature is a mutable cloud which is always and never the same.
Great geniuses have the shortest biographies.
When nature has work to be done, she creates a genius to do it.
This time, like all time, is a very good one but if we know what to do with it.
We are always getting ready to live but never living.
Nature always wears colours of the spirit.
