Hunger makes short devotion.

In its direct sense, physical hunger can overpower religious concentration and good intentions. Someone who is hungry may find prayer, reflection, or other acts of devotion difficult to sustain.

Figuratively, the saying warns that basic bodily needs demand attention before lofty duties or ideals can reasonably be expected to hold a person's full attention.

Use it when practical deprivation interrupts religious observance or other idealistic efforts. It can also gently remind others that food, comfort, or rest may need to come before sustained concentration or moral resolve is expected.