92SermonsofJonathanEdwards
Now this sort of purity of heart is absolutely necessary in order to our coming to see God. There must be a renunciation of all impure and lascivious practices and conversation. They who live in the indulgence of such a lust in one kind of practice or another, or though it be only with their eyes or in their thoughts, are of impure hearts, and shall never come to see God unless they have new hearts given them.
They that have pure hearts, abhor and are afraid of such things. Jude 23. They take heed that they do not prostitute their souls to so much as mental and imaginary, much less to practical, impurities, and works of darkness.
(2.) The heart is said to be pure, in respect to its being endowed with positive qualities, that are of a contrary nature to spiritual filthiness.
Though purity in strictness be only a freedom from filth, yet there are positive qualities of mind that seem to be implied in purity of heart, which may be reckoned a part of it, because of their contrariety to filthiness. The heart by reason of them is still more remote from defilement, as a greater light may be said to be purer than a lesser. For although the lesser light has no mixture of darkness, yet the greater light is still more remote from darkness.
1st. He is pure in heart, who delights in holy exercises. Those exercises that are holy are natural and pleasant to him, he sees the beauty there is in holiness, and that beauty has such strong influence upon his heart that he is captivated thereby. He delights in the pure and holy exercise of love to God, in the fear of God, in praising and glorifying God, and in pure and holy love to men. He delights in holy thoughts and meditations. Those exercises of the understanding that are holy, are most agreeable to him, and those exercises of the will. Such inclinations, desires, and affections, are most delightful, which are spiritual and holy.