Post Easter thought on the importance of the Resurrection.
When you buy a house or a car, there's a transaction that occurs. Two people sign a bill of sale. You sign accepting the property in exchange for your payment, and the seller signs accepting your payment and tranferring the property to you. There's no deal unless both buyer and seller sign.
There was a transaction as Jesus suffered on the cross, but it was an unseen one occuring in heaven. Jesus was buying our sins and their death penalty in exchange for the payment of his perfect blood. He signed the transaction that his side of the deal was done when he uttered the words, "It is finished" (John 19:30).
In the physical world, people only saw a man die by crucifixion for the crime of blasphemy. He had claimed to be God, did what only God had the right to do, and accepted praise rightly due God alone. Justice was served.
The rocks stopped shaking. The skies cleared. The dead man was placed in a tomb. People went home to celebrate Passover. The world thought all was the same it had been.
Then, the third day, God signed the transaction. He affirmed Jesus' identity and worthiness to take our sins, proclaimed justice satisfied, and set us free from the penalty of our sin by killing death through Resurrection! "He was delivered up for our trespasses and raised for our justification" (Romans 4:25, HCSB). Without the Resurrection, we are not justifed in Jesus' sacrifice.
Both parties - Son and Father - had to sign the transaction. There had to be both a Cross and a Resurrection - else "... if Christ has not been raised, your faith is worthless; you are still in your sins" (1 Corinthians 15:17, NASB95).
Where you see a cross, also see an empty tomb.