It takes many inches to make a mile. We can only move by inches, one inch at a time.
It's when we look miles ahead and wonder "how are we going to get so far?" that we fail to move forward at all.
We can choose to live life fully focused on the the moment at hand and live happily, making great progress, moving by inches.
Or, we can keep staring "in the rear view mirror", stuck with thoughts of what could have been, instead of what can now be.
Most important, we must always keep in mind that anytime we suffer a setback while moving forward, it will always be just a matter of inches, never miles.