The most central of all mysteries is the paschal mystery, the suffering, death, and resurrection. Christ is central to our life of faith, and central to his life is this mystery. Moreover, the paschal mystery is the secret to life, not only eternal life but the present life as well. Our happiness ultimately depends upon properly undergoing and understanding it.
The pattern was set by Jesus and his disciples: the suffering and death of Good Friday, the rising to new life on Easter, a period of 40 days during which he and the disciples adjusted to his new life and had to grieve what was to be no more, the Ascension which involved a letting go of the old and not clinging to what was, and Pentecost, the reception of the Spirit for the new life the disciples were already living.