"A shoe that is too large is apt to trip one, and when too small, to pinch the feet. So it is with those whose fortune does not suit them." Horace Greek 65 BC

"I have considered my ways and have turned my steps to your statutes. I will hasten and not delay to obey your commands." Psalm 119:59

Rubber soles are best for protecting you feet from the shock of concrete, but thick leather will also do.