For if, while we were God's enemies, we were reconciled to him through the death of his Son, how much more, having been reconciled, shall we be saved through his life! - Romans 5:10 (emphasis mine)
The resurrection is far more than just a dead man coming back to life - it is proof that Good Friday was not in vain. The power of death has been broken. Death could not hold the Son of God, and by his rising again we see firmly at last that Jesus is indeed God's son, that all that he said about himself was true. What has happened means that life has changed from black and white to technicolor - as the radiance of the resurrection transforms our lives.
The resurrection is essential, for what it showed and what it proved, and in what it means for all of us. Because when we accept Jesus as Saviour and as Lord in our lives, we die with him, and then we live with him. It is the ultimate new beginning, the ultimate transformation, the ultimate moment where death is overcome and life begins anew.
Happy Easter. Happy Resurrection Sunday. May you know the risen Christ more closely every day.