Jesus' presence itself didn't enlighten the disciples, although surely it did help. It seems, however, that it was as Jesus broke bread with these two disciples the light went on. Maybe it was a flashback to the Upper Room that opened their eyes. Perhaps they hadn't previously recognized Jesus because his appearance was altered from what it had been before. Could be that their sadness and disappointment had clouded their vision. But something changed in that moment. And new excitement, hope, and purpose shaped their hearts and lives from that time on.
Maybe you're ready for a fresh wind of the Holy Spirit. God may be ready to open your eyes to some deeper understanding of his grace and truth. There may be a moment in your future when the disappointment, grief, or discouragement will be replaced with a new vision of God's faithfulness, love, and power. If...or when!...it happens, do what they did: Tell your friends and loved ones. And rejoice in the Good News of God.