A Corrupt Heart Was the Source of Awe
By Thomas Boston

We have seen what man was, as God made him, a lovely and happy creature. Let us view him now as he has unmade himself. We shall see him a sinful and a miserable creature. This is the sad state we are brought into by the fall. Man's nature is now wholly corrupted. There is a sad alteration, an astonishing overturning in the nature of man. Where at first there was nothing evil, now there is nothing good.

And God saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually. Genesis 6.5 All their wicked practices are here traced to the fountain and spring head. A corrupt heart was the source of all. The soul, which was made upright in all its facilities, is now wholly disordered. The heart, which was made according to God's own heart, is now the reverse of it, a forge of evil imaginations, a sink of inordinate affections, and a storehouse of all impiety.

Behold the heart of a natural man, as it is opened in our text. The mind is defiled. The thoughts of the heart are evil. The will and affections are defiled. The imagination of the thoughts of the heart, that is, whatever the heart frames within itself by thinking, such as judgment, choice, purposes, devices, desires, every inward motion is evil. Yes, and every imagination, every frame of his thoughts is evil. But is there not at least a mixture of good in them? No, they are only evil. Whatever changes may be found in them are only from evil to evil, for the imagination of the heart or frame of thoughts in natural men is evil continually. Not one holy thought can ever be produced by an unholy heart.

Oh, what a vile heart is this! Oh, what a corrupt nature is this! What can that heart be, whereof every imagination, every set of thoughts is only evil, and that continually? Surely that corruption is ingrained in our hearts, interwoven with our very natures, has sunk deep into our souls, and will never be cured but by a miracle of grace. Now such is man's heart, such is his nature. until regenerating grace changes it.