'Ashamed' in the Bible

So do not be ashamed to testify about our Lord or about me His prisoner, but with me take your share of suffering for the gospel [continue to preach regardless of the circumstances], in accordance with the power of God [for His power is invincible],

This is why I suffer as I do. Still, I am not ashamed; for I know Him [and I am personally acquainted with Him] whom I have believed [with absolute trust and confidence in Him and in the truth of His deity], and I am persuaded [beyond any doubt] that He is able to guard that which I have entrusted to Him until that day [when I stand before Him].

The Lord grant mercy to the family of Onesiphorus, because he often refreshed me and showed me kindness [comforting and reviving me like fresh air] and he was not ashamed of my chains [for Christ’s sake];

Study and do your best to present yourself to God approved, a workman [tested by trial] who has no reason to be ashamed, accurately handling and skillfully teaching the word of truth.