God is particularly interested in what is going on within the heart of man. Specifically, He seeks for, and desires to find, TRUTH.
God wants believers to serve Him in truth. In fact, it is this very issue that will determine “of what sort” our work is at the judgment seat of Christ.
When men choose to reject the truth, God tends to withhold further truth from them. The result is spiritual and intellectual darkness.
A tender heart quickly and readily yields when offered correction; however, as a heart becomes hardened, the times of yielding become fewer and farther apart. During the hardening process, the individual finds the true nature of the heart more difficult to grasp. As the heart further hardens, the individual finds himself involved in further defiance. The mischief may start as seemingly insignificant, but a hardening heart will ultimately lead to greater depths of wickedness, some seemingly unimaginable only a short time ago. Some of the worst sins committed in the Bible by God's people were committed by those who shortly before had displayed a tender heart. Yet, they allowed their hearts to be hardened by the deceitfulness of sin.
