"For though I preach the gospel, I have nothing to glory of: for necessity is laid upon me; yea, woe is unto me, if I preach not the gospel!" 1 Corinthians 9:16

Preach
A full Gospel - Christ and nothing less
A plain Gospel - Christ and nothing more
A pure Gospel - Christ and nothing else

Necessity
1. The command above (Mark 16:15)
2. The cry below (Luke 16:27)
3. The call without (Acts 16:9)
4. The compassion within (Acts 17:16)