ounce of prevention is worth a pound of cure, an

ounce of prevention is worth a pound of cure, an

It is easier to forestall a disaster than to deal with it. For example, The new law makes all children under twelve wear bicycle helmets-an ounce of prevention. This ancient proverb is first recorded in Latin in Henry de Bracton's De Legibus (c. 1240) and has been repeated ever since, often in shortened form.
See also: of, ounce, pound, prevention, worth