When a man's eyes are sore his friends do not let him finger them, however much he wishes to, nor do they themselves touch the inflammation: But a man sunk in grief suffers every chance comer to stir and augment his affliction like a running sore; and by reason of the fingering and consequent irritation it hardens into a serious and intractable evil.
PlutarchWhat sort of tree is there which will not, if neglected, grow crooked and unfruitful; what but Will, if rightly ordered, prove productive and bring its fruit to maturity? What strength of body is there which will not lose its vigor and fall to decay by laziness, nice usage, and debauchery?
Plutarch