Mojo, we don't make a choice to live in the moment-- it's where we do live. We have no choice. Even when we fantasize that we're in the past or future, we're not.
We can live in the past and the future if are open to reality beyond three dimensions. Our self that lives in the past seems degraded simply because entropy distorts information. Our self that lives in the future is forming in front of us in the present moment. Light or energy or the life force brings it into being or consciousness. It is irrational to say "I will not or do not live beyond this moment" unless what we mean by "I" is as transient as the moment itself. Entropy is the source of all evil and we can only combat it by keeping ourselves open to growth.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver