Question
What is the resurrection of Jesus? (that He rose from the dead, and why it matters)
Analysis
What the accounts report
All four Gospels record the empty tomb on the first day of the week and Jesus' appearances (Matthew 28; Mark 16:6; Luke 24; John 20). He is seen first by Mary Magdalene (John 20:16), then by the disciples, and by doubting Thomas, who is invited to touch His wounds and responds 'my Lord and my God' (John 20:27; John 20:28). Paul preserves an early list of witnesses, Peter, the Twelve, then 'more than five hundred' at once, most still living when he wrote (1 Corinthians 15:5; 1 Corinthians 15:6), inviting readers to check the testimony. Jesus had predicted He would rise (Matthew 16:21), and the apostles' preaching from the very first sermon centered on it: 'God raised him up' (Acts 2:24).
Why it is the hinge of everything
Paul's argument in 1 Corinthians 15 is blunt: the resurrection is not optional. If it did not happen, preaching is empty, faith is futile, and the dead are lost (1 Corinthians 15:14; 1 Corinthians 15:17; 1 Corinthians 15:19). But 'Christ has indeed been raised from the dead' (BSB, 1 Corinthians 15:20), and that changes everything: it proves the cross actually worked (sins are forgiven), it shows Jesus is who He claimed to be (Romans 1:4), and it makes His people's own resurrection sure, because He is the firstfruits of a coming harvest (1 Corinthians 15:20–1 Corinthians 15:22; 1 Thessalonians 4:14). This is why the resurrection, more than any single teaching, is the ground of Christian hope.