John Calvin Commentary Romans 8:18

"For I reckon that the sufferings of this present time are not worthy to be compared with the glory which shall be revealed to us-ward." — Romans 8:18 (ASV)

I indeed judge, etc. Although those who understand this as a kind of modification do not hold an entirely unsuitable view, I prefer to see it as an encouragement, meant to anticipate an objection. The intended meaning is this: “It should not indeed be grievous to us if we must pass through various afflictions into heavenly glory, since these, when compared with the greatness of that glory, are of the least importance.”

He has referred to eternal glory as future glory, suggesting that the afflictions of the world are those that pass away quickly.

It is therefore clear how poorly this passage has been understood by the Schoolmen, for they have drawn from it their frivolous distinction between congruity and condignity. The Apostle, indeed, does not compare the worthiness of the one with that of the other, but only lightens the burden of the cross by comparing it with the greatness of glory, in order to strengthen the faithful in patience.