Be prepared and willing to share the gospel

“But in your hearts honor Christ the Lord as holy, always being prepared to make a defense to anyone who asks you for a reason for the hope that is in you; yet do it with gentleness and respect.” (2 Peter 3:15 ESV)

The Gospel is the power of God that changes everyone who believes.

“For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek.” (Rom. 1:16 ESV)

God uses people to preach the Gospel so people will hear and believe

“For “everyone who calls on the name of the Lord will be saved.” How then will they call on him in whom they have not believed? And how are they to believe in him of whom they have never heard? And how are they to hear without someone preaching?” (Rom. 10:13-14 ESV)

It is the great commission given by Jesus

“And He said to them, ‘Go into all the world and preach the gospel to every creature.'” (Mark 16:15 NKJV)

“But in your hearts honor Christ the Lord as holy, always being prepared to make a defense to anyone who asks you for a reason for the hope that is in you; yet do it with gentleness and respect.” (2 Peter 3:15 ESV)

The Gospel is the power of God that changes everyone who believes

“For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek.” (Rom. 1:16 ESV)

It is the great commission given by Jesus

“And He said to them, ‘Go into all the world and preach the gospel to every creature.'” (Mark 16:15 NKJV)

Therefore... 

“Declare His glory among the nations, His wonders among all peoples.” (Psalm 96:3 NKJV)