If it is to your advantage, make a forward move;
if not, stay where you are.

Anger may in time change to gladness; vexation may
be succeeded by content.

But a kingdom that has once been destroyed can
never come again into being; nor can the dead ever
be brought back to life.

Hence the skillful fighter puts himself into
a position which makes defeat impossible, and does
not miss the moment for defeating the enemy.
- Sun Tzu, Art of War