To show us what God is like:
2 Corinthians 4:4
Colossians 1:13,15
Hebrews 1:3

So we can know and understand God:
John 8:19
John 12:45
John 14:7-9

To make a way for us to be forgiven for our sins, be reconciled to God, and have eternal life:
John 3:16
John 1:29
John 10:10
Romans 5:8
Ephesians 2:4-7
1 John 4:8-10