Some of Jesus' last words were: "You will receive power to be my witnesses". we should not be ashamed of the gospel. But we live in a world that people who do good are ashamed and who do bad do not.
Acts 1: 8
They will be My witnesses in Jerusalem, in all Judea and Samaria, and to the ends of the earth.
Thank you @theonlyway, Under no circumstance should we be ashamed of God's word, for if we are ashame to share His word, Jesus will also be ashamed to introduce us to His father.