Romans 2:4 - Matthew Poole's English Annotations on the Holy Bible

Here he taxeth such as thought God approved of their persons and courses, at least that he would not regard or punish their evil actions, because he had hitherto forborne them, and heaped up abundance of worldly blessings upon them, as he did upon the Romans especially, above other people. It is common for men to grow secure, and promise themselves impunity, when God forbears them, and gives them outward prosperity: see Psalms 50:21, Psalms 55:19 Ecclesiastes 8:11 Hosea 12:8. Despisest thou? the word signifies, to think amiss; he despiseth the goodness of God, who thinks otherwise of it than he should, that it is extended to him for other ends than it is: or, to despise the goodness of God, is, to turn it into wantonness. The riches of his goodness; i.e. The abundance of his goodness: see Romans 9:23 Ephesians 1:7,18 Ephesians 2:4,7 3:8. Forbearance and long-suffering; God's long-suffering is a further degree of his forebearance: the Scripture speaks much of this attribute of God, and of his abounding therein, Exodus 34:6 Numbers 14:11,18 Psa 86:15 Matthew 23:37 Romans 9:22 1 Timothy 1:16 1 Peter 3:20. The goodness of God leadeth thee to repentance; that is one great end of God's goodness and forbearance; see Hosea 11:4 2 Peter 3:9. God's goodness is abused when it is not used and improved to this end.