"Whereunto I am appointed a preacher, and an apostle, and a teacher of the Gentiles. For the which cause I also suffer these things: nevertheless I am not ashamed: for I know whom I have believed, and am persuaded that he is able to keep that which I have committed unto him against that day."
-- The apostle Paul was not ashamed of the Gospel. Why? Very simply because he had a personal relationship with Jesus. He knew Jesus personally. He confidently says that he knows the One in whom he has believed.
May we take the time to get to know the Lord so we too could say as Paul did, I know Him.