full of vigour; pullulate;

fire at the target a hundred times without a single miss; A hundred shots, a hundred bull's eyes;

fight a hundred battles, win a hundred victories; A hundred battles, a hundred victories;

If you know the enemy and know yourself, you need not to fear the result of a hundred battles.

Refers to great achievements.

have great magic power

be in good fettle; as fit as a fiddle;

It is a metaphor for those who are less capable to act in advance for fear of falling behind, and is mostly used for self-effacement.

Aspiring people