1 John 3:24

Verse 24. We know that he abideth in us, by the Spirit which he hath given us. These words may be either referred to the body of the Church in general or to the apostles, or to every one in particular. It is certain that God gave his Spirit to his Church and to the apostles, by the coming of the Holy Ghost in a visible manner, and by the miraculous gifts bestowed upon the apostles; but every one in particular has only a moral certainty that he has the Spirit of God, and his sanctifying grace in his soul. Witham.