It is the power of the mind to be unconquerable. - Seneca, The Stoic Philosophy of Seneca: Essays and Letters

"As Lucretius says: 'Thus ever from himself doth each man flee.' But what does he gain if he does not escape from himself? He ever follows himself and weighs upon himself as his own most burdensome companion. And so we ought to understand that what we struggle with is the fault, not of the places, but of ourselves"

"If anyone says that the best life of all is to sail the sea, and then adds that I must not sail upon a sea where shipwrecks are a common occurrence and there are often sudden storms that sweep the helmsman in an adverse direction, I conclude that this man, although he lauds navigation, really forbids me to launch my ship."