#141-1. We should try to be the parents of our future rather than the offspring of our past.
-Miguel de Unamuno, writer and philosopher (1864-1936)
#141-2. It is better to sleep on things beforehand than lie awake about them afterwards.
-Baltasar Gracian, philosopher and writer (1601-1658)
#141-3. You pile up enough tomorrows, and you'll find you've collected a lot of empty yesterdays.
-Professor Harold Hill (The Music Man)
The first two constitute good advice on planning for a new future without always being constrained by the past, and on pausing to consider all angles before plunging into action.
The third cautions against overdoing the above.