14 And Jesus, having found a young ass, sat thereon; as it is written, 15 Fear not, daughter of Zion: behold, thy King cometh, sitting on an ass's colt. 16 These things understood not his disciples at the first: but when Jesus was glorified, then remembered they that these things were written of him, and that they had done these things unto him.
Matthew Henry's Commentary on John 12:14-16
Commentary on John 12:12-19
(Read John 12:12-19)
Christ's riding in triumph to Jerusalem is recorded by all the evangelists. Many excellent things, both in the word and providence of God, disciples do not understand at their first acquaintance with the things of God. The right understanding of spiritual nature of Christ's kingdom, prevents our misapplying the Scriptures which speak of it.