treasurest up unto thyself wrath against the day of wrath, and revelation of the righteous judgment of God." The reason given why the house of Israel would not obey God, was, that they were hardhearted: Ezekiel 3:7, "But the house of Israel will not hearken unto thee; for they will not hearken unto me: for all the house of Israel are impudent and hard-hearted." The wickedness of that perverse rebellious generation in the wilderness, is ascribed to the hardness of their hearts: Psal. 95:7-10, "To-day if ye will hear his voice, harden not your heart, as in the provocation, and as in the day of temptation in the wilderness; when your fathers tempted me, proved me, and saw my work: forty years long was I grieved with this generation, and said, It is a people that do err in their heart," &c. This is spoken of as what prevented Zedekiah's turning to the Lord: 2 Chron. 36:13, "He stiffened his neck, and hardened his heart from turning to the Lord God of Israel." This principle is spoken of, as that from whence men are without the fear of God, and depart from God's ways: Isa. 63:17, "O Lord, why hast thou made us to err from thy ways and hardened our heart from thy fear?" And men's rejecting Christ, and opposing Christianity, is laid to this principle: Acts 19:9, "But when divers were hardened, and believed not, but spake evil of that way before the multitude." God's leaving men to the power of the sin and corruption of the heart is often expressed by God's hardening their hearts: Rom. 9:18, "Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth." John 12:40, "He hath blinded their minds, and hardened their hearts." And the apostle seems to speak of "an evil heart that departs from the living God, and a hard heart," as the same thing: Heb. 3:8, "Harden not your heart, as in the provocation," &c.; ver. 12, 13, "Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God: but exhort one another daily, while it is called to-day; lest any of you be hardened through the deceitfulness of sin." And that great work of God in conversion, which consists in delivering a person from the power of sin, and mortifying corruption, is expressed, once and again, by God's "taking away the heart of stone, and giving a heart of flesh," Ezek. 11:19, and chap. 36:26. Now by a hard heart, is plainly meant an unaffected heart, or a heart not easy to be moved with virtuous affections, like a stone, insensible, stupid, unmoved, and hard to be impressed. Hence the hard heart is called a stony heart, and is opposed to a heart of flesh, that has feeling, and is sensibly touched and moved. We read in Scripture of a hard heart, and a tender heart; and doubtless we are to understand these, as contrary the one to the other. But what is a tender heart, but a heart which is easily impressed with what ought to affect it? God commends Josiah, because his heart was tender; and it is evident by those things which are mentioned as expressions and evidences of this tenderness of heart, that by his heart being tender is meant, his heart being easily moved with religious and pious affection: 2 Kings 22:19, "Because thine heart was tender, and thou hast humbled thyself before the Lord, when thou heardest what I spake against this place, and against the inhab- itants thereof, that they should become a desolation and a curse, and hast rent thy clothes, 25 Part I. Concerning the nature of the affections and their importance in…