Dwell.

The Time Traveller, in theory, could
do all the things I know I would -
correct all of those mistakes from His past,
and cherish those moments He once thought would last.
It's easy to dwell upon such fantastical things,
itching a desire inflamed like lasting insect stings -
but I know that the The Time Traveller,
in theory, should
do all the things the same.
He could not sacrifice the rest
for his own personal gain.