I must acknowledge the great evil that there is in sin, and in my sin; the malignity of its nature, and its mischievousness to me.

The sinfulness of sin.

O that sin may appear sin to me, may appear in its own colours; and that by the commandment I may see it to be exceeding sinful, Romans 7:13 because it is the transgression of the law. 1 John 3:4

By every willful sin I have in effect said, I will not have this man to reign over me. Luke 19:14 And, Who is the Lord, that I should obey his voice? Exodus 5:2 And thus have I reproached the Lord, Numbers 15:30 and cast his laws behind my back. Nehemiah 9:26

The foolishness of sin.

O God, thou knowest my foolishness, and my sins are not hid from thee. Psalm 69:5 I was foolish in being disobedient, Titus 3:3 and my lusts are foolish and hurtful. 1 Timothy 6:9

Foolishness was bound up in my heart when I was a child; Proverbs 22:15 for though vain man would be wise, he is born like the wild ass’s colt. Job 11:12

My way hath been my folly, Psalm 49:13 and in many instances I have done foolishly. 2 Samuel 24:10

So foolish have I been and ignorant, and even as a beast before God. Psalm 73:22