But how do you learn perseverance on that scale? You have to grow in it. “If you have run with footmen and they have tired you out, then how can you compete with horses?” (Jer. 12:5). The end of the age will be a horse race, not a foot race. Fasting is the ideal exercise to stretch your endurance muscles. Can you fast for one day or week? Good, try three! Have you fasted for five consecutive days? Excellent, now try ten. Then 20. Then 40. See?
