The result of our relationship as Kingdom Ambassadors should be what motivates us to evangelize people who do not know Christ.
Here is an outline of why we should focus on sharing the Gospel with those who do not know Christ.
(These ideas are taken from http://azsbc.org/my316docs_eng/Outlines.pdf)
God's Love is the key factor.
1. The reason - God loves us is the first thing that John 3:16 teaches us , "For God so loved". the reason why "God so loved"because God himself is love. 1 John 4:7-10
2. The object of God's love is the "The World"
3. The sacrifice of God's Love's - is 'that He gave his one and only son" What is the sacrifice of God's love? It is Jesus Christ dying for the sins of the world. Romans 5:8 says "But God demonstrates His own love towards us, in that while we were yet sinners, Christ died for us." Jesus Christ died on the cross for our sins, was buried, but in three days He rose out of the grave with all power in His hands (1 Cor 15:3-4)
4. The recipient of the Gift of God's Love - whosoever: "Whosoever believe in Him should not perish, but shall have everlasting life."John 3:16