The renewal and sanctification of the soul is the only sure ground on which the Christian can build his unfailing hope of salvation. Not that any may presume to limit the extent of the Divine mercy, or state a definite time for the operations of the Holy Spirit. The first is as boundless as it is unsearchable; the second may be as instantaneous as it is incomprehensible. Thus much we know with certainty, that when that most encouraging call to repentance was addressed to the Jewish people,—“Let the wicked forsake his way, and the unrighteous man his thoughts; and let him return unto the Lord, and He will have mercy upon him; and to our God, for He will abundantly pardon;”—there was added, “For my thoughts are not your thoughts, neither are your ways my ways, saith the Lord: for as the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts.” {45} Still, all who have time and opportunity must prove the sincerity of their repentance, and the soundness of their faith by the holiness of their practice. Nor can it be too earnestly insisted upon, that it is only by the gift of a new and holier nature, man can rise above the pleasures of sense and things of time, and set his affections on the joys of immortality; and that the new and holier nature is implanted, when the gracious promise is fulfilled—“I will give them one heart, and _I will put a new spirit within you_; _and I will take the stony heart out of their flesh_, and will give them an heart of flesh: that they may walk in my statutes, and keep mine ordinances, and do them: and they shall be my people, and I will be their God.” {46a} It is to the use of palliatives much of the insincere repentance and imperfect reformation of men is to be ascribed. When their fears are alarmed, they set about correcting some flagrant sins, and it may be, become outwardly moral, and even attentive to religious duties; but the renewal of the heart, through grace, and the dedication of its affections to God, are never thought of; and yet they are satisfied with this condition. Such persons are only to be roused by preaching conversion or condemnation. They must be taught to pray, with repentant David, “_Make me a clean heart_, _O God_, _and renew a right spirit within me_. Cast me not away from thy presence; and take not thy Holy Spirit from me. O give me the comfort of thy help again, and stablish me with thy free Spirit.” {46b}