Will ye accept his person? will ye contend for God?
Accept his person - God's; i:e., be partial for Him, as when a judge favours one party in a trial, because of personal considerations.
Contend for God - namely, with fallacies and prepossessions against Job before judgment (Judges 6:31). Partiality can never please the impartial God; nor the goodness of the cause excuse the unfairness of the arguments.