“...Christ [Son] is faithful over God's [Father] house as a son. And we are His house if indeed we hold fast our confidence and our boasting in our hope. Therefore, as the Holy Spirit says, ‘Today, if you hear his voice, do not harden your hearts as in the rebellion, on the day of testing in the wilderness, where your fathers put me to the test and saw my works for forty years. Therefore I was provoked with that generation, and said, “They always go astray in their heart; they have not known my ways.” As I swore in my wrath, “They shall not enter my rest.”’” (Hebrews 3:6-11, E.S.V.). The Holy Spirit warns and guides the Father’s household as they continually confess faith in the Son.
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“...our Lord Jesus Christ...has knit together the society of His new people by sacraments, very few in number, most easy of observance, and most excellent in meaning; such is baptism consecrated by the name of the Trinity; such is the communion of the body and blood of the Lord...”
Augustine, quoted in John Calvin’s Institutes of the Christian Religion (4.19.3).
Fellowship’s foundation: one God in three Persons, blessed Trinity.Fellowship’s binding grace: the cross of Christ.