Micah 2:1

Wo to them that devise iniquity - Who lay schemes and plans for transgressions; who make it their study to find out new modes of sinning; and make these things their nocturnal meditations, that, having fixed their plan, they may begin to execute it as soon as it is light in the morning.

Because it is in the power of their hand - They think they may do whatever they have power and opportunity to do.