Origen
Catena Aurea · Lukasevangelium 3
And he came into all the country about Jordan, preaching the baptism of repentance for the remission of sins; As it is written in the book of the words of Esaias the prophet, saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight. Every valley shall be filled, and every mountain and hill shall be brought low; and the crooked shall be made straight, and the rough ways shall be made smooth; And all flesh shall see the salvation of God.
Or, a way must be prepared in our heart for the Lord, for the heart of man is large and spacious if it has become clean. For imagine not that in the size of the body, but in the virtue of the understanding, consists that greatness which must receive the knowledge of the truth. Prepare then in thy heart by good conversation a way for the Lord, and by perfect works pursue the path of life, that so the word of God may have free course in thee.