'Act' in the Bible

On the other hand I am filled with power—With the Spirit of the Lord—And with justice and courageTo make known to Jacob his rebellious act,Even to Israel his sin.

Mankind, He has told you what is goodand what it is the Lord requires of you:to act justly,to love faithfulness,and to walk humbly with your God.

Nations will see this and be disappointed by all their strength, they will put their hands over their mouths, and act as if they were deaf.

Who is a God like You, who pardons iniquityAnd passes over the rebellious act of the remnant of His possession?He does not retain His anger forever,Because He delights in unchanging love.