Exodus 33:11 Thus the Lord used to speak to Moses face to face, as a man speaks to his friend.
Exodus 34:29 When Moses came down from Mount Sinai, with the two tablets of the testimony in his hand as he came down from the mountain, Moses did not know that the skin of his face shone because he had been talking with God.
Easton’s Bible Dictionary
Face:
means simply presence, as when it is recorded that Adam and Eve hid themselves from the “face [R.V., ‘presence’] of the Lord God” (Gen 3:8; Exd 33:14,15, where the same Hebrew word is rendered “presence”). The “light of God’s countenance” is his favour (Psa 44:3; Dan 9:17). “Face” signifies also anger, justice, severity (Gen 16:6,8; Exd 2:15; Psa 68:1; Rev 6:16). To “provoke God to his face” (Isa 65:3) is to sin against him openly.
The Jews prayed with their faces toward the temple and Jerusalem (1Ki 8:38,44,48; Dan 6:10). To “see God’s face” is to have access to him and to enjoy his favour (Psa 17:15; 27:8). This is the privilege of holy angels (Mat 18:10; Luk 1:19). The “face of Jesus Christ” (2Cr 4:6) is the office and person of Christ, the revealer of the glory of God (Jhn 1:14,18).
John 15:15 No longer do I call you servants, for the servant does not know what his master is doing; but I have called you friends, for all that I have heard from my Father I have made known to you.
John 5:44 How can you believe, when you receive glory from one another and do not seek the glory that comes from the only God?
Since I am writing to you, you cannot see my face. Faces carry messages that enhance our words, carrying emotions that can go further than definitions or word choice can convey. It is my wish that my words should be enough to show you who I am, but I would rather do this face to face.
I cannot and so I am limited to hoping my words will be enough. Moses did not know his face shone but others could see it. You may not know your face has changed, but others can see it.
John 1:14 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.
Glory is His essence, His presence, full of grace and truth.
Colossians 1:27 To them God chose to make known how great among the Gentiles are the riches of the glory of this mystery, which is Christ in you, the hope of glory.
I can only see Christ in you when we are face to face. Until then I will write to you His Word.