Gabriel gives his testimony of being saved out of the hatred anger that consumed his wicked heart. There was no way Gabriel was ever going to break the power of the drugs and addictions that reigned on his life without looking to Jesus Christ alone for hope. Many people are slaves of drugs and get morality and change outwardly but only Christ can change a man inwardly.
2 Corinthians 5:17 - Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come.