Follow the prescription of the ancient philosopher Bion of Borysthenes: ‘We should not try to alter circumstances but to adapt ourselves to them as they really are, just as sailors do. They don’t try to change the winds or the sea but ensure they they are always ready to adapt themselves to the conditions. In a flat calm they use the oars; with a following breeze they hoist full sail; in a headwind they shorten sail or heave to. Adapt yourself to circumstances in the same way.’