Sacerdotalis Caelibatus §33

³³ The kingdom of God, which "is not of this world," (60) is present here on earth in mystery, and will reach its perfection only with the glorious coming of the Lord Jesus. (61) The Church here below constitutes the seed and the beginning of this kingdom. And as she continues to grow slowly but surely, she longs for the perfect kingdom and ardently desires with all her energy to unite herself with her King in glory. (62) The pilgrim People of God are on a journey through the vicissitudes of this life toward their heavenly homeland, (63) where the divine sonship of the redeemed (64) will be fully revealed and where the transformed loveliness of the Spouse of the Lamb of God will shine completely. (65)