Strength of mind rests in sobriety; for this keeps your reason unclouded by passion – Pythagoras

The possession of anything begins in the mind – Bruce Lee

All paid jobs absorb and degrade the mind – Aristotle

The energy of the mind is the essence of life – Aristotle

Suffering becomes beautiful when anyone bears great calamities with cheerfulness, not through insensibility but through greatness of mind – Aristotle

It is the mark of an educated mind to be able to entertain a thought without accepting it – Aristotle