A happy life consists in tranquillity of mind.
A life of peace, purity, and refinement leads to a calm and untroubled old age.
A mind without instruction can no more bear fruit than can a field, however fertile, without cultivation.
Advice is judged by results, not by intentions.
All action is of the mind and the mirror of the mind is the face, its index the eyes.
Art is born of the observation and investigation of nature.
As the old proverb says 'Like readily consorts with like'.
He only employs his passion who can make no use of his reason.
He removes the greatest ornament of friendship, who takes away from it respect.
I will go further, and assert that nature without culture can often do more to deserve praise than culture without nature.