To dwell in the here and now does not mean
you never think about the past or responsibly
plan for the future. The idea is simply not to
allow yourself to get lost in regrets about the
past or worries about the future.
If you are firmly grounded in the present moment,
the past can be an object of inquiry, the object of
your mindfulness and concentration. You can attain
many insights by looking into the past. But you are
still grounded in the present moment.
~ Thich Nhat Hanh