Energy may be likened to the bending of a crossbow; decision, to the releasing of a trigger.

War is a matter of vital importance to the state.

Concentrate your energy and hoard your strength.

The Art of War is self-explanatory

If a battle can not be won do not fight it.

One need not destroy one's enemy. One need only destroy his willingness to engage.

If I wish to engage, then the enemy, for all his high ramparts and deep moat, cannot avoid engagement; I attack that which he is obliged to rescue.