I love the story of the blind man that was healed in this chapter. Once again, the Pharisees are upset because Jesus "worked" on the Sabbath.
I think the thing though that jumped out the most was verse 31. The ESV Study Bible included the cross references to the Psalms. Thankfully when we sin we can go to God and ask forgiveness.
31 We know that God does not listen to sinners, but if anyone is a worshiper of God and does his will, God listens to him.
Psalm 34:15 - The eyes of the LORD are toward the righteous and his ears toward their cry.
Psalm 66:18 - If I had cherished iniquity in my heart, the Lord would not have listened.
Psalm 109:7 - When he is tried, let him come forth guilty; let his prayer be counted as sin!
Psalm 145:19 - He fulfills the desire of those who fear him; he also hears their cry and saves them.
Thankfully we have 1 John 1:9 - If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.