John Gill's Exposition of the Whole Bible
Proverbs 15:9
The way of the wicked [is] an abomination unto the Lord,.... The way his heart devises, which he chooses and delights in, in which he walks; nor will he leave it, nor can he be diverted from it, but by the powerful grace of God. This is a way not good, but evil, and so an abomination to the Lord; and the whole tenor and course of his life, which is meant by his way being evil: hence his sacrifices, and all his external duties of religion performed by him, are abominable to the Lord; for, while he continues in a course of sin, all his religious exercises will be of no avail, cannot be pleasing and acceptable to God;
but he loveth him that followeth after righteousness; either after a justifying righteousness; not the righteousness of the law, which the carnal Jews followed after, but did not attain unto; nor is righteousness to be had by the works of the law, nor any justification by it, nor can a man be acceptable to God on account of it; but the righteousness of Christ, which he has wrought out, and is revealed in the Gospel: to follow after this supposes a want of one; a sense of that want; a view of the glory, fulness, suitableness, and excellency of Christ's righteousness; an eager desire after it, sometimes expressed by hungering and thirsting after it, as here by a pursuit of it; which means no other than an earnest and importunate request to be found in it: and such, as they shall be satisfied or filled with it, so they are loved by the Lord, and are acceptable to him through the righteousness they are seeking after: or else it may be understood of following after true holiness of heart and life, without which there is no seeing the Lord; and though perfection in it is not attainable in this live, yet a gracious soul presses after it, which is well pleasing in the sight of God.