Letters 57.6

Accordingly, as I said, I experienced a certain transformation, though it could not be called confusion. Then at the first glimpse of restored daylight my good spirits returned without forethought or command. And I began to muse and think how foolish we are to fear certain objects to a greater or less degree, since all of them end in the same way. For what difference does it make whether a watchtower or a mountain crashes down upon us? No difference at all, you will find. Nevertheless, there will be some men who fear the latter mishap to a greater degree, though both accidents are equally deadly; so true it is that fear looks not to the effect, but to the cause of the effect.

Seneca, Letters to Lucilius 57.6, translated by Richard Mott Gummere