Go so far as you can see and when you get there you will always be able to see farther. … as you head toward your goals, be prepared to make some slight adjustments to your course. You don't change your decision to go — you do change your direction to get there.
p. 164; Variant: When obstacles arise, you change your direction to reach your goal; you do not change your decision to get there. - See You at the Top (2000)