Proverbs 12:8

8 According to the measure of his intelligence is a man praised, And whoever is of a perverse mind is despised. Everywhere in the Mishle שׂכל has no other meaning than intellectus. The praise which is given to a man measures itself לפי שׂכלו (punctuate לפי־שׂכלו, according to Torath Emeth, p. 41, Accentssystem, xx. 1), i.e., according to the measure (so לפי is used in the oldest form of the language) of his intelligence, or as we may also say, of his culture; for in these proverbs, which make the fear of God the highest principle, שׂכל means also understanding of moral excellence, not merely the intellectual superiority of natural gifts. הלּל is here a relative conception of manifold gradations, but it does not mean renown in general, but good renown. Parallel with שׂכלו, לב refers to the understanding (νοῦς); the rendering of Lwenstein, "who is of false heart," is defective. נעוה (synon. of נפתּל and עקּשׁ, but nowhere else interchanging with it) means here a vero et recto detortus et aversus (Fl.). Such a man who has not a good understanding, nor any certain rule of judgment, falls under contempt (Graec. Venet. τῷ ὀντωτῇ εἰς μυσαγμόν, after the false reading of יהוה instead of יהיה), i.e., he defames himself by his crooked judgment of men, of things and their relations, and is on this account in no position rightly to make use of them.

We are here told whence to expect a good name. Reputation is what most have a high regard to and stand much upon. Now it is certain, 1. The best reputation is that which attends virtue and serious piety, and the prudent conduct of life: A man shall be commended by all that are wise and good, in conformity to the judgment of God himself, which we are sure is according to truth, not according to his riches or preferments, his craft and subtlety, but according to his wisdom, the honesty of his designs and the prudent choice of means to compass them. 2. The worst reproach is that which follows wickedness and an opposition to that which is good: He that is of a perverse heart, that turns aside to crooked ways, and goes on frowardly in them, shall be despised. Providence will bring him to poverty and contempt, and all that have a true sense of honour will despise him as unworthy to be dealt with and unfit to be trusted, as a blemish and scandal to mankind.

12:8 To be sensible means to act only after reflecting on the consequences. A warped mind acts on impulse.