Authors:

The potential infinite means nothing other than an undetermined, variable quantity, always remaining finite, which has to assume values that either become smaller than any finite limit no matter how small, or greater than any finite limit no matter how great.

"Communications on the Theory of the Transfinite ('Mitteilungen zur Lehre vom Transfiniten')". Book by Georg Cantor, 1888.
The potential infinite means nothing other than an undetermined, variable quantity, always remaining finite, which has to assume values that either become smaller than any finite limit no matter how small, or greater