Settle this down in your heart, and do not let it go. The sons of God are a people "led by the Spirit of God," and always led more or less in the same way. Their experience will tally wonderfully when they compare notes in heaven. This is one mark of sonship.
(2) Furthermore, all the sons of God _have the feelings of adopted children towards their Father in heaven_. What says the Scripture which heads this paper? "Ye have not received the spirit of bondage again to fear, but ye have received the Spirit of adoption, whereby we cry Abba Father." (Rom. viii. 15.)
The sons of God are delivered from that slavish fear of God which sin begets in the natural heart. They are redeemed from that feeling of guilt which made Adam "hide himself in the trees of the garden," and Cain "go out from the presence of the Lord." (Gen. iii. 8; iv. 16.) They are no longer afraid of God's holiness, and justice, and majesty. They no longer feel as if there was a great gulf and barrier between themselves and God, and as if God was angry with them, and must be angry with them, because of their sins. From these chains and fetters of the soul the sons of God are delivered.
Their feelings towards God are now those of peace and confidence. They see Him as a Father reconciled in Christ Jesus. They look on Him as a God whose attributes are all satisfied by their great Mediator and Peacemaker, the Lord Jesus,--as a God who is "just, and yet the Justifier of every one that believeth on Jesus." (Rom. iii. 26.) As a Father, they draw near to Him with boldness: as a Father, they can speak to Him with freedom. They have exchanged the spirit of bondage for that of liberty, and the spirit of fear for that of love. They know that God is holy, but they are not afraid: they know that they are sinners, but they are not afraid. Though holy, they believe that God is completely reconciled: though sinners, they believe they are clothed all over with Jesus Christ. Such is the feeling of the sons of God.
I allow that some of them have this feeling more vividly than others. Some of them carry about scraps and remnants of the old spirit of bondage to their dying day. Many of them have fits and paroxysms of the old man's complaint of fear returning upon them at intervals. But very few of the sons of God could be found who would not say, if cross-examined, that since they knew Christ they have had very different feelings towards God from what they ever had before. They feel as if something like the old Roman form of adoption had taken place between themselves and their Father in heaven. They feel as if He had said to each one of them, "Wilt thou be my son?" and as if their hearts had replied, "I will."
Let us try to grasp this also, and hold it fast. The sons of God are a people who feel towards God in a way that the children of the world do not. They feel no more slavish fear towards Him: they feel towards Him as a reconciled parent. This, then, is another mark of sonship.
(3) But, again, the sons of God _have the witness of the Spirit in their consciences_. What says the Scripture which heads this paper? "The Spirit itself beareth witness with our spirit, that we are the children of God." (Rom. viii. 16.)
The sons of God have got something within their hearts which tells them there is a relationship between themselves and God. They feel something which tells them that old things are passed away, and all things become new: that guilt is gone, that peace is restored, that heaven's door is open, and hell's door is shut. They have, in short, what the children of the world have not,--a felt, positive, reasonable hope. They have what Paul calls the "seal" and "earnest" of the Spirit. (2 Cor. i. 22; Eph. i. 13.)