"To despise the riches of God's grace is the blackest of all sins. It far outweighs the sins that are a violation of righteousness. Fallen man has a fallen nature. That is why the Lord seemed to overlook the outbreaks of the flesh, knowing man's frame and remembering that he is but dust (Psalm 103:14). You who boast, perhaps, that you are not guilty of the great fleshly sins should realize that the despising of God's goodness is a sin that far transcends an act that might be called a crime under human law.
"Why is God so good toward the lost? He declares that the purpose of the riches of his goodness, forbearance and longsuffering is to lead man to repentance; and he further declares that man does not know the object of God's goodness. Is this not a further picture of the state of man by nature? Can it not be seen that the dark ignorance of unbelief has brought a further fruit of ignorance of the grace of God? You are in good health? Why does God permit it? The answer is that he wants you to turn to him and acknowledge his goodness and accept the riches that he has for you. You have other blessings that come from the common grace of God. The purpose of such riches is to cause you to turn about-face and come to Him for further blessing."
~ Donald Grey Barnhouse