“You are my witnesses,” says Yahweh, “With my servant whom I have chosen; that you may know and believe me, and understand that I am he. Before me there was no God formed, neither will there be after me.
⛓ Read Isaiah 43 forward — the whole chapter and its afterlife →Where this passage surfaces again, sorted by the strength of the link. Each kind of reuse — formal quotation, deliberate allusion, faint echo, figural pattern — carries its own mark. Follow any reference to read it in place.
Allusion4
A deliberate verbal borrowing without a citation formula.
'That you may know and believe me and understand that I am he' (LXX hina pisteusēte... hoti egō eimi) supplies the exact 'believe that I am he' construction of v.24,28. High Volume and Coherence; Isaiah's courtroom of witnesses for the one God matches John's witness theme and 'I am he' formula.
High confidence'A witness... of the things which you have seen' echoes 'You are my witnesses, says the LORD, and my servant whom I have chosen' — the conjunction of 'servant' and 'witness' in Paul's call matches Isaiah's pairing exactly.
Medium confidence'that you may... believe me and understand that I am he (ani hu / ego eimi)' supplies the LXX 'I am' that stands behind Jesus' words on the sea. Strengthens the case that v.20's ego eimi is theophanic rather than mere identification.
Medium confidenceDeutero-Isaiah's 'that you may know and believe... that I am he' (ego eimi) supplies the monotheistic confessional sense John attaches to Jesus' self-declaration. The Isaianic ego eimi formula is the most plausible Second-Temple background for the absolute usage, reinforcing Exodus 3:14 and adding Recurrence across John's I-am sayings.
Medium confidenceEcho1
A fainter, low-volume reuse, carried by recurrence or thematic coherence.
God's declaration 'Ye are my witnesses... that ye may know and believe me' parallels John's structure of divine testimony aimed at belief and knowledge of God. The 'testimony of God' that one must receive develops Isaiah's courtroom scenes where God testifies to himself. Both stage a trial in which God's own witness compels faith.
Medium confidence◇ Figural1
A typological pattern re-read in a later text — no verbal quotation, high figural coherence.
'That you may know and believe me... that I am he' supplies the exact pattern of foretelling-so-you-may-believe-I-am-he that John reproduces in 13:19. The Deutero-Isaian 'I am he' (ani hu) is the immediate scriptural matrix for the Johannine ego eimi. Verbal and structural overlap are strong.
High confidence