I fell (epesa). Late form for the old epeson (second aorist active indicative of piptō, to fall). Under the over-powering influence of the vision as in Rev 19:10.
He laid (ethēken). First aorist active indicative of tithēmi. The act restored John’s confidence.
Fear not (mē phobou). Cf. Luk 1:13 to Zacharias to give comfort.
I am the first and the last (egō eimi ho prōtos kai ho eschatos). Used in Isa 44:6; Isa 48:12 of God, but here, Rev 2:8; Rev 22:13 of Christ.
And the Living One (kai ho zōn). Present active articular participle of zaō, another epithet of God common in the O.T. (Deu 32:40; Isa 49:18, etc.) and applied purposely to Jesus, with which see Joh 5:26 for Christ’s own words about it.