Contemplative prayer is a communion of love bearing Life for the multitude, to the extent that it consents to abide in the night of faith. The Paschal night of the Resurrection passes through the night of the agony and the tomb - the three intense moments of the Hour of Jesus which his Spirit (and not "the flesh [which] is weak") brings to life in prayer. We must be willing to "keep watch with (him) one hour."
Source: Catechism of the Catholic Church (Vatican.va)