The Paraphrase of Shem (VII, 1)

Blessed are they who guard themselves against the heritage of death, which is the burdensome waters of darkness. For it will not be possible to conquer them in a few moments, since they hasten to come forth from the error of the world. And if they are conquered, they will be kept back from them and be tormented in the darkness until the time of the consummation. When the consummation has come and nature has been destroyed, then their thoughts will separate from the darkness.  Nature has burdened them for a short time. And they will be in the ineffable light of the unbegotten Spirit without a form.  And thus is the mind as I have said from the first.
Henceforth, O Shem, go in grace, and continue in faith upon the earth. For every power of light and fire will be completed by me because of you. For without you they will not be revealed until you speak them openly. When you cease to be upon the earth, they will be given to the worthy ones. And apart from this proclamation, let them speak about you upon the earth, since they will take the carefree and agreeable land.

-from the Nag Hammadi Library pg. 361