Happy is the man who has broken the chains which hurt the mind, and has given up worrying once and for all.
man mind
Poetry comes fine-spun from a mind at peace.
mind peace poetry
The mind, conscious of rectitude, laughed to scorn the falsehood of report.
mind
All things can corrupt when minds are prone to evil.
Little things please little minds.
Minds that are ill at ease are agitated by both hope and fear.