Enneads I.5: Does Happiness Increase With Time?
Increased Happiness Would Result Only from More Perfect Grasp
3. What shall be said of him who lived happily during a longer period, who has longer contemplated the same spectacle? If such longer contemplation resulted in a clearer idea thereof, the length of time has served some useful purpose; but if the agent contemplated it in the same manner for the whole extent of time, he possesses no advantage over him who contemplated it only once.
4. It might be objected that the former of these men enjoyed pleasure longer than the other. This consideration has nothing to do with happiness. If by this (enjoyed) pleasure we mean the free exercise (of intelligence), the pleasure referred to is then identical with the happiness here meant. This higher pleasure referred to is only to possess what is here ever present; what of it is past is of no further value.