Nature is a mutable cloud which is always and never the same.
Happy is the hearing man; unhappy the speaking man.
No great man ever complains of want of opportunity.
Little minds have little worries; big minds have no time for worries.
We are immersed in beauty, but our eyes have no clear vision.
All I have seen teaches me to trust the creator for all I have not seen.
When nature has work to be done, she creates a genius to do it.
The reward of a thing well done is having done it.
Science does not know its debt to imagination.
Every man in his lifetime needs to thank his faults.
