And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth. (John 1:14)
The phrase ‘dwelt among us’ carries the idea of pitching a tent as a dwelling, in fact some translations express it as he ‘tabernacled’ among us (e.g., Amplified, Young’s). In choosing this wording John is giving us a connection, or comparison, with the tabernacle of God’s presence amongst Israel in the wilderness and Jesus dwelling in our midst. With the backdrop of this tent in the wilderness in mind, John writes of having seen the glory of the Son.
One manifestation of this glory was the overwhelming glory when the tabernacle was first set up (Exodus 40:34-35) which is seen in Jesus at the transfiguration (Luke 9:28-35). There are other instances of the glory of God being seen in Jesus, such as when he was baptized, when he calmed the storm, and when he raised Lazarus from the dead.
But John is not as concerned with the spectacular as we might be (note John 4:48 and John 6:26-29), he devotes large parts of his gospel to accounts of Jesus bringing light and life to those he meets (see John 4:5-42 and John 10:1-18). Most significantly, John devotes the last nine chapters (13–21) to the final day of Jesus’ life, the hour of Jesus’ departure (John 13:1) occupies over a third of John’s gospel.
Jesus loved his own to the end, and in this the glory of the only Son of God is revealed.