Overcoming sin, blessed though it surely is, is but the bare minimum of a believers experience. There is nothing astonishing in it. Not to overcome sin is what ought to astonish us.
Irrespective of how we physiologically are made, even possessing special weaknesses, we can overcome our sins through the Lord.
The child of God should not be overanxious to make new gains; what he essentially requires is to keep what he already has, for not losing is itself a gain. The way to retain what he possesses is to engage it.