One way a believer can't grow...

J.C. Ryle“I hold firmly that the justification of a believer is a finished, perfect and complete work and that the weakest saint, though he may not know and feel it, is as completely justified as the strongest. I hold firmly that our election, calling and standing in Christ admit of no degrees, increase or diminishing. If anyone dreams that by growth in grace I mean growth in justification, he is utterly wide of the mark and utterly mistaken about the whole point I am considering. I would go to the stake, God helping me, for the glorious truth, that in the matter of justification before God every believer is complete in Christ (Col. 2:10). Nothing can be added to his justification from the moment he believes, and nothing taken away.”