'Act' in the Bible

Be mindful, therefore, of the height from which you have fallen. Repent at once, and act as you did at first, or else I will surely come and remove your lampstand out of its place--unless you repent.

Let the dishonest man act dishonestly still; let the filthy make himself filthy still; let the righteous practise righteousness still; and let the holy be made holy still."