The Blessed One said:
You shouldn’t chase after the past
or place expectations on the future.
What is past
is left behind.
The future
is as yet unreached.
Whatever quality is present
you clearly see right there,
right there.
Not taken in,
that’s how you develop the heart.
Ardently doing
what should be done today,
for—who knows?— tomorrow
There is no bargaining
with Mortality & his mighty horde.
Whoever lives thus ardently,
both day & night,
has truly had an auspicious day

The Buddha