Moses and Aaron, Nadab and Abihu, and seventy of the elders of Israel went up; and they saw the God of Israel... they saw God, and ate and drank. (Exodus 24:9–11)
The elders of Israel saw God on Sinai. The story doesn't tell us what He looked like, which seems to be the common theme. As far as I can tell, only Daniel (Daniel 7:9) and Ezekiel (Ezekiel 1:26–28) describe what God looks like. Isaiah saw God in the temple (Isaiah 6:1–13), but he only describes the angels. Even the description in Revelation 4:1–7 only describes the One on the throne in vague terms, while it describes the creatures around the throne in detail.
But scripture tells us twice that the elders of Israel saw God on Sinai. I tell my Sunday school class, when Scripture repeats something, it's for a reason. The Spirit of God doesn't ramble on like I do, every word has a purpose. So Exodus 24 is emphasizing the point, that they saw God.
John 1:18 tells us, no one has seen God at any time. I take that to mean, not that no one has actually seen God, but no one has seen God completely. The story in Exodus 33:18–23, corroborates this: when Moses asks to see God's glory, he is denied. But he is allowed to see God's goodness.
(John 1:18 goes on to tell us that Christ has declared God. Perhaps that's why the two prophets called "son of man" (Ezekiel 2:1, Daniel 8:17) are allowed to describe God, while the rest are not. Certainly the Son of Man has declared Him (John 3:13).)
I think about Exodus 24 frequently when we're gathered to remember the Lord. We see that the elders of Israel are called to go apart from the camp (v. 1). They saw God (v. 9), they ate and drank (v. 11). We, too, are called to leave, to come into the Lord's presence, to see God, and to eat and drink (1 Corinthians 11:20–34). Of course it's our place to gaze on the glory of the Lord all through the week (2 Corinthians 3:18). We're not called to contemplate Him only once a week... but we are definitely called to gather together to eat and drink and remember Him.
I ask myself, do I really do that? When I gather in the little meeting hall here, I definitely eat and drink... but do I see God? Do I get a really good look at Christ?
Rodger reminded me that our eating and drinking is an announcement of the death of the Lord (1 Corinthians 11:26), and that the death of the Lord is connected in Scripture with the end of everything here (Galatians 6:14). Do I allow myself to casually announce that, week after week, without really entering into what it means?
1 Corinthians 11:29 warns about eating and drinking without discerning. I'm not sure that's entirely the same thing, but it is all to easy to eat and drink without seeing first.