It isn't the mountain ahead that wears you out; it's the grain of sand in your shoe.

Summary

This quote suggests that often it is not the big challenges or obstacles in life that exhaust us, but rather the small and seemingly insignificant annoyances. The mountain represents the major hurdles we face, which might seem overwhelming but are manageable. On the other hand, the grain of sand in our shoe symbolizes the small, irritating problems that we often overlook or underestimate, yet have the power to frustrate and distract us. It serves as a reminder to focus on removing the small irritants to maintain our motivation and energy in overcoming larger challenges.