From the Emmaus road account (Luke 24:13-35).
Why do you suppose these two men were "kept from recognizing" Jesus for hours (v. 16)? The clue, I think, is in verse 25. Jesus called them "foolish" and "slow of heart to believe" the Scriptures. Their outward inability to recognize Jesus mirrored their inward unbelief of what the Scriptures revealed about him.
Now, Jesus fully intended to help them see. But notice the priority of Jesus' revelation: before he opened their physical eyes, he purposed to open their heart-eyes.
Why? Because it was of utmost importance that they "walk by faith, not by sight" (2 Corinthians 5:7)...