Romans 6:11-12 Likewise you also, reckon yourselves to be dead indeed to sin, but alive to God in Christ Jesus our Lord. Therefore do not let sin reign in your mortal body, that you should obey it in its lusts.

The other aspect of Reckoning The Effects of The Cross is Reigning. On the Cross, you died to good and bad things that you may attain and correctly rule over them. Having known the workings of the Cross, we are meant to Reign as Kings and Lords over things (good or bad) that the Cross has purchased for us.

Reign from the throne of Christ and do not let defeated and powerless beings and things to scheme you out of what is rightly yours. Besides focusing on what the cross gave you look forward to what is around Christ Jesus in the heavens above. Reign over subjects that willingly submit to you as well as those who need a rod of iron.

Endeavor not to enter a "fist fight" with wayward subjects but Let your Father make them your footstool. King David had fist fights in the early part of life and when he sat on the throne, other people took on that role; Jesus used to cast devils in some way but he sits on the throne and other entities take care of that now. Your mind is key in this Reigning, for by it we bring every thought to the obedience of Christ.