Jesus Christ, on that occasion, demonstrated His divine ability to impart understanding, just as He’s able to impart knowledge

Then opened he their understanding, that they might understand the scriptures (Luke 24:45).
The Bible says in John 20:21-22, “Then said Jesus to them again, Peace be unto you: as my Father hath sent me, even so send I you. And when he had said this, he breathed on them, and saith unto them, Receive ye the Holy Ghost.” This was the same account that Luke reported in our opening verse, but he wasn’t an eyewitness when Jesus ministered to the disciples. John was an eyewitness and he tells us in actuality what happened.
So, how exactly did Jesus open the understanding of His disciples? We’re not told anything happened to them outwardly when “…he breathed on them, and saith unto them, Receive ye the Holy Ghost” (John 20:22). So, how did Luke know that the breathing on them by Jesus was what opened their understanding?
Job 32:8 (ASV) says, “But there is a spirit in man, And the breath of the Almighty giveth them understanding.” The King James translation of the same verse says, “But there is a spirit in man: and the inspiration of the Almighty giveth them understanding.” The word translated, “inspiration” means “breath”; the breath of the Almighty gives understanding.
When Luke was told that Jesus breathed on the disciples and they understood the Scriptures, he knew exactly where the understanding came from. Jesus Christ, on that occasion, demonstrated His divine ability to impart understanding, just as He’s able to impart knowledge. Remember, He’s the embodiment of all wisdom and knowledge: “In whom are hid all the treasures of wisdom and knowledge” (Colossians 2:3).
Perhaps, you require insight into certain mysteries and secrets—secrets about your work, your academics or anything in particular—you can trust Him. Hallelujah! .