Ye have seen what I have done to the Egyptians, and [how] I have borne you on eagles' wings and brought you to myself. And now, if ye will hearken to my voice indeed and keep my covenant, then shall ye be my own possession out of all the peoples for all the earth is mine and ye shall be to me a kingdom of priests, and a holy nation. These are the words which thou shalt speak to the children of Israel.
Exodus 19:2 they departed from Rephidim, and came [into] the wilderness of Sinai, and encamped in the wilderness; and Israel encamped there before the mountain.
Exodus 19:3 And Moses went up to God, and Jehovah called to him out of the mountain, saying, Thus shalt thou say to the house of Jacob, and tell the children of Israel:
Exodus 19:4 Ye have seen what I have done to the Egyptians, and [how] I have borne you on eagles' wings and brought you to myself.
Exodus 19:5 And now, if ye will hearken to my voice indeed and keep my covenant, then shall ye be my own possession out of all the peoples for all the earth is mine
Exodus 19:6 and ye shall be to me a kingdom of priests, and a holy nation. These are the words which thou shalt speak to the children of Israel.
Exodus 19:7 And Moses came and called the elders of the people, and laid before the mall these words which Jehovah had commanded him.
Exodus 19:8 And all the people answered together, and said, All that Jehovah has spoken will we do! And Moses brought the words of the people back to Jehovah.
The verse centers on "seen", "done", "egyptians", "borne", "eagles'", "wings", "brought", and "myself". It is saying that the verse draws attention to "seen" and "done", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 3's "And Moses went up to God and..." into verse 7's "And Moses came and called the elders...", so "seen" and "done" belong inside that flow. In Exodus context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "seen" and "done" with trust shaped by these words, not by a vague optimism outside the passage.