"Whoever therefore shall be ashamed of Me and of My words in this adulterous and sinful generation; of him also shall the Son of Man be ashamed, when He comes in the glory of His Father with the holy angels.” (v.38)
Jesus said, “But whoever disowns me before others, I will disown before my Father in heaven” (Matthew 10:33) - Very dangerous company to be in. Why you may ask, because Hades is a real place, a place of eternal separation from God, of darkness, and torment, both day and night. A place reserved for those who do not believe in Jesus Christ, the Son of the Most High God.
What would you give in exchange for your soul? All Jesus is asking for is your belief in Him, that you not be ashamed to acknowledge Him. But man is to worried with what he would need to give up, in order to do that. He would rather remain in his current rebellious and sinful state, than to stand with Christ unashamed.
So what can man expect if he remains ashamed to identify with Christ? A place reserved in Hades (a place of torments) to await judgment until after the final resurrection. (Luke 16:22-23) Better to identify with Him now, than to be excluded by Him later.
The Truth: “The LORD knows how to deliver the godly out of temptations and to reserve the unjust under punishment (Hades) for the “day of judgment” (2 Peter 2:9).