The chapter Philip began with — almost certainly the heart of the Emmaus sermon too.
Read the verse in full at Blue Letter Bible (ESV).
The first taste — one dip, the whole day.
Isaiah 52:13–53:12 stands alone today because it stood alone in history: the clearest pre-written account of the cross in all Scripture. Despised and rejected; pierced for our transgressions; silent as a lamb; assigned a grave with the wicked yet buried with the rich; and then — the line the two on the road had never absorbed — after his soul makes an offering for guilt, 'he shall see his offspring; he shall prolong his days.' Suffering, then glory. Death, then life prolonged. The whole Emmaus rebuke lives in this chapter.
Promise and fulfillment — every claim linked for verification.
When the Ethiopian official asked 'about whom does the prophet say this?', Philip 'beginning with this Scripture told him the good news about Jesus' (Acts 8:32–35). Same starting point, same destination.
'Guilt offering' (Isa 53:10) — the Levitical sacrifice for specific, quantified wrong (Lev 5). Isaiah says the Servant's soul becomes that offering: not a martyr's example but a substitute's payment, itemized.
Deepest water — where the passage meets your week.
Count the substitution pronouns in Isaiah 53:4–6: our griefs, our sorrows, our transgressions, our iniquities — his wounds, his chastisement, his stripes. The gospel is grammar before it is feeling: a great exchange written into the pronouns. When assurance wavers, do not consult your emotions; parse the sentence. 'The LORD has laid on him the iniquity of us all' — laid means laid.