You need a change of soul rather than a change of climate. - Seneca

You see that man can endure toil: Cato, on foot, led an army through African deserts. You see that thirst can be endured: he marched over sun-baked hills, dragging the remains of a beaten army and with no train of supplies, undergoing lack of water and wearing a heavy suit of armour; always the last to drink of the few springs which they chanced to find. You see that honour, and dishonour too, can be despised: for they report that on the very day when Cato was defeated at the elections, he played a game of ball. You see also that man can be free from fear of those above him in rank: for Cato attacked Caesar and Pompey simultaneously, at a time when none dared fall foul of the one without endeavouring to oblige the other. You see that death can be scorned as well as exile: Cato inflicted exile upon himself and finally death, and war all the while.

The highest good is a mind that scorns the happenings of chance, and rejoices only in virtue.

I am inclined to think that the power of wisdom is better shown by a display of calmness in the midst of provocation, just as the greatest proof that a general is mighty in his arms and men is his quiet unconcern in the country of the enemy.