John Gills Exposition of the Bible Commentary - Proverbs 24:8
He that deviseth to do evil shall be called a mischievous person To do evil is natural to men, all are prone to it; being conceived and born in sin, and, from the womb, more or less commit it: but for a man to sit down and contrive evil, as some men are inventors of evil things; contrive new sins, or at least new methods of sinning, such as new oaths, new games, new ways of tricking and deceiving men; and are always studying and devising ways and means of committing sin, and doing that which... read more
Matthew Henry's Complete Commentary - Proverbs 24:7-9
Here is the description, 1. Of a weak man: Wisdom is too high for him; he thinks it so, and therefore, despairing to attain it, he will take no pains in the pursuit of it, but sit down content without it. And really it is so; he has not capacity for it, and therefore the advantages he has for getting it are all in vain to him. It is no easy thing to get wisdom; those that have natural parts good enough, yet if they be foolish, that is, if they be slothful and will not take pains, if they be... read more