And now how can it appear otherwise than absurd, that when God possessed none of those things which it was befitting for Him to possess, He should afterwards, by a kind of progress, come into the possession of them? But if there never was a time when He was not omnipotent, of necessity those things by which He receives that title must also exist; and He must always have had those over whom He exercised power, and which were governed by Him either as king or prince, of which we shall speak more fully in the proper place, when we come to discuss the subject of the creatures. (Book I, Chapter 2, Part 10)

The Greek for omnipotent is Παντοκράτωρ or pantokrator. The meaning is essentially identical: all powerful, almighty, full strength, wholly potent, all sustaining.

The notion of all sustaining could be especially important in reading Origen. Gsijsbert van den Brink explains:

...Plato's Timaeus promoted the idea of God's (i.e. the Demiurge's) preservation
of what was created by Him. The Middle Stoic think Posidonus introduced it from
both Anximander and the Timaeus into Stoic circles , and seems to have used the
simple kratein as a further synonym... It is this new use of kratein with the
accusative in the sense of "to sustain, to preserve, to hold" which entered also
into Christian discourse... the term pantokrator is now more and more going to
point to a continuous relationship between God and the world. (Almighty
God: A study of divine omnipotence, page 51-52)

This is a very different sense of potency and more consistent with my understanding and experience. So far, this is not what I "hear" from Origen. But let's keep reading and listening.

The image is of Christ Pantocrator from the Palermo Cathedral (12th Century mosaic)