2 things:
a) the dying of the old man
b) the coming to life of the new man
This is by God’s Sovereign work alone through the saving instrumentality of the gift of grace & faith.
To die to self – is to be genuinely sorry for my sin, to hate it more and more & to run away from it.
To come to life – is to receive wholeheartedly with joy Christ Jesus, and to have a desire to do every kind of good work as God desires of me