User blog comment:Crimson and Darkness/Shin DxD 4 discussion/@comment-40183495-20200221101007/@comment-37560916-20200221143022

Man, yes, Issei is a miracle, buy its a completely well justified miracle, and the training helped a lot(This is stated several times in the novel). 95% of the things that he won were due to his effort, except the Amrita(Thay was a complete convenient- gifted power, but luckily is the only one). Ophis helped Issei because he unlocked te DxD with his feelings and his family supporting him, it was not a "convenient gift" or somerhing like that, he won thay help, it was justified and it's something coherent,  such as almost all the power ups of Issei.