31. The Son therefore is only and true God for this also is assigned to the Son as His sole right. For of no created being can it be accurately said that he is alone. How can he to whom fellowship in creation belongs be separated from the rest, as though he were alone? Thus man is seen to be a rational being amongst all earthly creatures, yet he is not the only rational being; for we know that the heavenly works of God also are rational, we confess that angels and archangels are rational beings. If then the angels are rational, man cannot be said to be the only rational being.
Complete source paragraph · Exposition of the Christian Faith, Chapter II., source paragraph 7 · Original source