It is difficult to combine and bring together those things – the carefulness of one devoted to material things, and the steadiness of one who is indifferent to them – but it is not impossible; otherwise happiness would be impossible. It is like planning a sea voyage. What can I do? I can choose the captain, the sailors, the day, the right moment. Then a storm comes upon us. At this point, what concern is it of mine? My part is done. The problem belongs to another – the captain. Epictetus, Discourses 2.5.9
