Franklin contrasts the length of a life with the quality of how it is lived. Simply accumulating years does not necessarily make a life satisfying or worthwhile. A long life may still feel lacking if it is without purpose, good relationships, useful activity or other sources of meaning. Duration alone, in this view, is an incomplete measure of a life’s value.

The second half of the saying reverses the emphasis: a life lived well can be considered sufficient regardless of its length. The point is not that longevity is undesirable, but that living longer should not be treated as the highest good in itself. The quotation encourages attention to the character and substance of life rather than to its duration alone. It can therefore be read as a reflection on mortality and fulfilment, suggesting that the central question is not merely how long someone lives, but what they make of the time available to them.