God trains you and moves you forward, when you have been trained, your training stage becomes your past. He doesn’t train you with the devil’s tools, he trains you with the word. Assuming you had an aweful past, you have to learn to be like Paul, he said:
“… this one thing I do, forgetting those things which are behind, and reaching forth unto those things which are before…Let us therefore, as many as be perfect (mature), be thus minded”
Notice, he said the mature ones in Christ always reach forth to a more glorious future! Don’t let the devil hunt you with a past that God has already washed away. Maybe you made mistakes, make up your mind that from henceforth, you would be trained by the word, so that tomorrow you would look at your past and smile at how much training and inspiration you have received.