Happiness is beneficial for the body, but it is grief that develops the powers of the mind.
Marcel ProustIt is the mind that maketh good or ill, That maketh wretch or happy, rich or poor.
Michel de MontaigneThe reading of all good books is like a conversation with the finest minds of past centuries.
Rene DescartesDiscipline strengthens the mind so that it becomes impervious to the corroding influence of fear.
Bernard Law Montgomery