The way of an eagle in the air; the way of a serpent upon a rock; the way of a ship in the midst of the sea; and the way of a man with a maiden.
All Commentaries on Proverbs 30:19 Go To Proverbs 30
Ambrose of Milan
AD 397
An eagle and a ship and a serpent are not of one family and nature but of a distinguishable and different substance, and yet they are three. On the testimony of Scripture, therefore, [the Arians] learn that their arguments are against themselves. Therefore, in saying that the substance of the Father and of the Son is diverse and their Godhead distinguishable, [the Arians] themselves assert there are two gods. But we, when we confess the Father and the Son, in declaring them still to be of one Godhead, say that there are not two gods but one God. And this we establish by the Word of the Lord. –.