Here is my rendering of a statement I particularly like from his comments on Colossians 1:10:
Is not our God difficult and pernickety, so that unless you satisfy him in many ways, you might displease him in some and frustrate your satisfaction in many ways? If this is the situation, is any mortal able to be saved? For there is nobody who at no point might sin. And what is the benefit to us of the grace of Christ's mediation? I answer: In this way indeed righteousness is in him, that whoever stumbles in one thing, is guilty in all.However we should consider that on the one hand it is true our imperfection may be earned, yet we may also be impacted by grace. Because we are believing in Christ our saviour, all may fail in many ways. It is of grace that our offences are on account of Christ not imputed.