That got me thinking: What if we could live forever? How would we live?
Would we live opposite to the philosophy of treating each day as if it were our last? Or would we aim to keep that sort of intense focus on appreciating the present? Would we focus on the long-term instead?
This line of thought brought me to consider the concept of w4w -- work for work's sake -- from The 4-Hour Workweek. This concept refers to simply spending time doing things "productively" and "efficiently" without regard to their purpose, need, or effectiveness. It also involves postponing life or procrastinating on decisions that are difficult to make (like how one would spend one's free time if one had it) since it's a lot easier to just spin one's wheels doing work that one knows how to do.
I feel like the two philosophies of long-term perspective and carpe diem are not necessarily at odds; it seems like the right approach may be doing both simultaneously.