Using mystery

"The expert in warfare says: Rather than dare make the attack I’d take the attack; rather than dare advance an inch I’d retreat a foot. It’s called marching without marching, rolling up your sleeves without flexing your muscles, being armed without weapons, giving the attacker no opponent. Nothing’s worse than attacking what yields. To attack what yields is to throw away the prize. So, when matched armies meet, the one who comes to grief is the true victor."