Neal A. Maxwell said,

“Paul wrote of how, even after faithful disciples had “done the will of God,” they “[had] need of patience.” ( Heb. 10:36.) How many times have good individuals done the right thing initially only to break under subsequent stress? Sustaining correct conduct for a difficult moment under extraordinary stress is very commendable, but so is coping with sustained stress subtly present in seeming routineness. Either way, however, we are to “run with patience the race that is set before us” ( Heb. 12:1), and it is a marathon, not a dash.”

“Endure it Well”
April 1990 General Conference