This was in our bulletin this morning in church, and I think it’s a great explanation of what the celebration of Easter means to Christians, and how we celebrate:

Easter begins the season of “alleluias.” They have been omitted during Lent in the contemplation of Christ’s suffering. But now death has turned to life. The “alleluias” of the congregation soar heavenward.
The stone has been rolled away. The tomb stands open wide. Christ’s resurrection makes possible the rolling away of the stone of eternal death for Easter people. But something more, the huge stone of despair, discouragement, doubt, and defeat can be rolled away from each Christian’s heart.
We adorn our sanctuary with white paraments and Easter lilies in celebration of this new life in Christ Jesus.