Authors:

Once you've committed yourself to something, pace yourself to the finish line.

Meb Keflezighi, Dick Patrick, Joan Benoit Samuelson (2010). “Run to Overcome: The Inspiring Story of an American Champion's Long-distance Quest to Achieve a Big Dream”, p.5, Tyndale House Publishers, Inc.
Once you've committed yourself to something, pace yourself to the finish line.