47 But Jesus, knowing what they were thinking in their heart, took a child and stood him by His side,
48 and said to them, “Whoever receives this child in My name receives Me, and whoever receives Me receives Him who sent Me; for the one who is least among all of you, this is the one who is great.” Luke 9:46-48.
Are you a child in His name? You are a child in His name if, through God’s grace of being born of God, you received Jesus. “But as many as received Him, to them He gave the right to become children of God, even to those who believe in His name, who were born, not of blood nor of the will of the flesh nor of the will of man, but of God.” John 1:12-13.
If you are a child in His name, then you are received by true believers of Christ. You also receive other true believers of Christ, and you are received by God the Father, God the Son (Jesus Christ), and God the Spirit. This is called fellowship, and there is nothing sweeter or more important.
“We who had sweet fellowship together Walked in the house of God in the throng.”
“They were continually devoting themselves to the apostles’ teaching and to fellowship, to the breaking of bread and to prayer.”
“God is faithful, through whom you were called into fellowship with His Son, Jesus Christ our Lord.”
“Do not be bound together with unbelievers; for what partnership have righteousness and lawlessness, or what fellowship has light with darkness?”
“The grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit, be with you all.”
“what we have seen and heard we proclaim to you also, so that you too may have fellowship with us; and indeed our fellowship is with the Father, and with His Son Jesus Christ.”
“If we say that we have fellowship with Him and yet walk in the darkness, we lie and do not practice the truth; but if we walk in the Light as He Himself is in the Light, we have fellowship with one another, and the blood of Jesus His Son cleanses us from all sin.”
Reformed Doctrine Daily Devotions 