Or HaChaim on Numbers 22:32/אור החיים על במדבר כ״ב:ל״ב

1 ויאמר אליו מלאך השם, The angel of the Lord said to Bileam, etc. We need to understand the angel's argument "why did you strike the ass three times?" It seems pretty obvious that Bileam struck the ass each time he perceived her to act disrespectfully towards him. Why did the angel have to ask? Besides, seeing that the angel said that he himself had been the cause that Bileam had been inconvenienced, why did he have to ask Bileam this question? The angel knew full well that Bileam had not been aware that the primary obstacle to his progress had been the angel and not the ass! The Torah itself testified that G'd had to open Bileam's eyes indicating that up until that moment they had been shut! Perhaps it was the angel's intention to humble Bileam so much that he would acknowledge by word that whereas his ass had seen an angel three times, he, the Seer who had claimed to be G'd's intimate, had not even seen the angel once. This would also demonstrate how insignificant had been Bileam's achievements in trying to penetrate the mysteries of how and when G'd does what He does. The words (verse 33) ותראני האתון, "the ass has seen me," were the ultimate degradation the angel inflicted when he contrasted Bileam's spiritual blindness with the ass's sensitivity to the presence of spiritual beings. These words had the effect of an arrow having been shot at Bileam's heart. This then was the whole purpose of G'd having despatched the angel.

2The angel had also wanted to demonstrate the immediate negative effects Bileam's decision to go with Balak's delegates had on his standing as a prophet. We have been told in Sanhedrin 106 that originally Bileam enjoyed Holy Spirit. As soon as he befriended Balak this Holy Spirit departed from him and the Bible refers to him as a קסם, sorcerer, (Joshua 13,22). The proof of this is the fact that he did not recognise that the angel was blocking his way. Previously he would have immediately recognised the angel as such. The angel had been despatched against him to apprise him of the fact that he had forfeited the Holy Spirit he once possessed. The operative words of the angels are כי ירט הדרך לנגדי, i.e. because he had decided to walk along that way against the wishes of G'd he lost his Holy Spirit (compare Nachmanides' comment on this verse).