Obedience, Detachment from possessions and Chastity are listed among the “excellences” of the Oratory, but you’re right, its members do not take these specific vows.
There is an old Oratorian saying, that one only knows a son of St. Philip on his deathbed. I once heard the provost of the Oxford Oratory, Fr. Daniel Seward, put it like this:
The only good Oratorian is a dead Oratorian. You only know you’ve persevered when you’re on your deathbed.
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Two of my patrons are Oratorians, one of them Blessed John Henry Newman. While reading his letters, I imbibed the sense of love and obedience that permeates this society. One of the key aspects of the Oratorian vocation is that there are no vows. Friendship and familial love are the ties that bind a Congregation together.
The following are from an outline, on a talk given on the Oratorians:
Canonical Status of the Oratory: "The Immutable State of the Oratory”:
a. not bound by any vow, oath, or promise—held together by the bond of charity.
b. members give themselves with a free will with the intention of remaining in the Congregation until death
c. every local Congregation rules
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Aspects of the Oratorian Vocation: Freedom to Leave the Congregation
a. Oratorians not bound by vows which would require them to remain
b. they serve freely as “volunteers”
c. “The true sons of Saint Philip are recognized at their burial.”
d. This is only possible through the grace of God, which must be sought and accepted every day—Saint Philip counseled his sons to pray daily for perseverance
e. “Oh, what a glorious thing, to die sons of St Philip!”
take care,
amsjj
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Jesus, God and man,
imprisoned by love in Thy most holy Sacrament,
have mercy upon us.
- Blessed John Henry Newman, December 22, 1851
Tú y yo sabemos por la fe que oculto en las especies sacramentales está Cristo,
ese Cristo con su Cuerpo, con su Sangre, con su Alma, y con su Divinidad,
prisonero de amor.
- San Josemaría Escrivá, 1 junio 1974
… Our Lord Himself frequently said; and it is recorded as an Apostolic tradition from Him
by St. Justin the Martyr. He says ‘Jesus often said, “They who are near Me are near a fire”’.
- Abp. W. B. Ullathorne, August 1st 1886