Saint Anselm,
Cur Deus Homo — Book First, Chapter X
“ The question which still troubles us is, how the death of the Son can be proved reasonable and necessary. For otherwise, it does not seem that the Son ought to desire it, or the Father compel or permit it. For the question is, why God could not save man in some other way, and if so, why he wished to do it in this way? For it both seems unbecoming for God to have saved man in this way; and it is not clear how the death of the Son avails for the salvation of man. ”
