John 1:18

no man hath seen God at any time; the only begotten son, who is intimate with the father, hath made him known.

John 12:41

these things said Esaias, when he saw his glory, and spake of him.

Treasury of Scripture Knowledge

Summary

And when Gideon perceived that he was an angel of the LORD, Gideon said, Alas, O Lord GOD! for because I have seen an angel of the LORD face to face.

Bible References

Because

John 1:18
no man hath seen God at any time; the only begotten son, who is intimate with the father, hath made him known.
John 12:41
these things said Esaias, when he saw his glory, and spake of him.