Im Lo Achshav Eimatai?

I have looked in meforshim and everyone is focused on "im lo achshav eimatai" as telling us to not procrastinate. Even the the most new-age-ey commentaries I could find take the same perspective. Yet, I am attached to the idea that if we don't live in the now then when are we living. I don't think it's crazy to suggest that Hillel, known for his equanimity, meant this.

there is only now

even as i write these words

i think of later

we might all live forever

if we'd just hold on to now