We know that our senses are subject to decay, that from our middle years they are decaying all the time; but happily it is as if we didn't know and didn't believe.

There is not a time that you walk through the street, when if you employed your senses, you would not learn something worthwhile.

. . . there is no perfect knowledge which can be entitled ours, that is innate; none but what has been obtained from experience, or derived in some way from our senses.

We must act swiftly in order to halt the rate of decay our planet faces.

Middle age is youth without its levity,/ And age without decay.

All beauteous things for which we liveBy laws of time and space decay.But oh, the very reason whyI clasp them, is because they die.