Victorinus of Poetovio
When the first seal was opened, John says that he saw a white horse and a rider with a crown, having a bow. This is what was done first. After this our Lord ascended into heaven, opened all things, and sent the Holy Spirit. His words, through the prophets, pierced the hearts of men like arrows and won victory over unbelief. The crown on the head was promised by the prophets through the Holy Spirit. Therefore the white horse is the word of prophecy with the Holy Spirit sent into the world. The Lord says: "This Gospel will be preached throughout the whole world, as a testimony to all nations; and then the end will come" (Mt 24:14).