You can't undo anything you've already done, but you can face up to it. You can tell the truth. You can seek forgiveness. And then let God do the rest.
TertullianBut now inquiry is being made concerning these issues. First, can any believer enlist in the military? Second, can any soldier, even those of the rank and file or lesser grades who neither engage in pagan sacrifices nor capital punishment, be admitted into the church? No on both counts.
TertullianThe Son of God died; it is by all means to be believed because it is absurd. And he was buried and rose again; the fact is certain, because it is impossible.
TertullianThe Lord challenges us to suffer persecutions and to confess Him. He wants thiose who belong to him to be brave and fearless. He himself shows how weakness of the flesh is overcome by courage of the Spirit....A christian is fearless.
TertullianIndeed it is better to postpone, lest either we complete too little by hurrying, or wander too long in completing it.
Tertullian[T]he Father, the Son, and the Holy Ghost [are] three ... not in condition, but in degree; not in substance, but in form; not in power, but in aspect; yet of one substance, and of one condition, and of one power, inasmuch as He is one God, from whom these degrees and forms and aspects are reckoned, under the name of the Father, and of the Son, and of the Holy Ghost.
Tertullian