Use when fear of loss is making you timid — the source of hesitation is usually an un-accepted worst case. Use to contrast 'win without fighting' (systems, negotiation) with 'accept the worst and move' (personal stakes).

The deepest philosophical split. Sun Tzu's crown jewel is winning without fighting — 'to break the enemy's resistance without fighting' — i.e., avoid the cost of battle. Musashi's first move is to accept the ultimate cost, death, as the ground of the whole art.