“Men of Israel, hear these words: Jesus of Nazareth, a Man attested by God to you by miracles, wonders, and signs which God did through Him in your midst, as you yourselves also know — Him, being delivered by the determined purpose and foreknowledge of God, you have taken by lawless hands, have crucified, and put to death; whom God raised up, having loosed the pains of death, because it was not possible that He should be held by it.
The whole foundation of the Christian faith is hinged on the death and resurrection of Jesus. This truth can be found in Paul’s statement in 1st Corinthians 15:17
"And if Christ is not risen, your faith is futile; you are still in your sins!"
The empty tomb signifies the resurrection of Jesus, the fact that Jesus died and rose again. This means those of us who have repented and believed in Him, have been forgiven and our sins have been washed away.