Bede, on Prov 27:3

“A stone is heavy, and sand weighty: but the anger of a fool is heavier than them both.”

“The stone is heavy, etc. It is indeed quite grievous for anyone to be weighed down by even a single capital crime, as if by the weight of a stone, or to be burdened by countless lighter sins, like pebbles or sand; but the anger of a fool is heavier than both, because these sins, once revealed as certainly evil as they are, more sharply prick the soul to chastise. Truly, because it is not a physical but a spiritual vice, the less it is perceived, the more it weighs down. Hence, he does not simply say anger, but the anger of a fool, is heavier than stone and sand. For the wise endeavor to examine and discipline their mental impulses as diligently as their actions and words.”

Imported from an open dataset — not yet checked against the printed edition.