In the dispute between presentism and eternalism, the affective dimensions of the debate have been somewhat neglected. Contemporary philosophers of time have not tried to relate these ontological positions with two of the most discussed maxims in the history of ethics—“live in the present” vs. “look at your life under the aspect of the eternity” (sub specie aeternitatis)—that since the Hellenistic times have been regarded as strictly connected with them. Consequently, I raise the question of whether the endorsement of one of these two ontological views can make a practical difference in the way we should live.