All sin is first against God, only God can make it right and change us

From Bsfinternational.org notes (https://resc.mybsf.org/PPL1_AdNotes_14_062018.pdf)

All sin is first against God. Saul confessed his wrong toward David but never acknowledged his rebellion against God.42 Saul’s life kept moving away from God. As believers struggle with sin, their lives ultimately move Christward.43 When the struggle is hard, remember: God has committed Himself to making each of His children like Jesus.44 If God is your Father,45 He will bring you safe to heaven.46 Ask Him for courage to allow His Word and Spirit to examine47 and change you.48
41: Confession: Psalm 51:1-10, 17
42: Saul’s rebellion: 1 Samuel 15:22-30
43: Believers’ struggle: Psalms 32; 41:4; 51; Romans 7:1-8:17; 1 John 1:5-9
44: Like Jesus: Romans 8:29; 1 John 3:1-3
45: God’s children: Matthew 6; John 1:12-13; 1 John 2:15-16,23-24
46: Eternal security: John10:27-30; Philippians 1:6;1 Thessalonians 5:24
47: Sin exposed: Psalms 19:7-11;139:23-24; John 16:8
48: Transformed: Romans 12:1-2;Philippians 2:12-13