Verse 5-7

The apostle has ever this adoption in view; God wills to have us for Himself before Him through Jesus, according to the good pleasure of His will, as His children. Now this is the glory of this grace which has placed us there. In these verses Paul speaks to us of the basis, of the means which God has employed, and on the certainty of which we can count. He speaks of it as of a settled thing, as of a thing which we possess, and the possession of which, indeed, is necessary to us, in order that we may partake of all that of which he is about to speak to us.
This is the door by which we have come in; and having passed through the door, in Jesus, I have the certainty of being in the house. But it would be sorrowful to have Jesus only as the door, though it is precious to understand that. If we are not sure of a hearty welcome, and of the love of the Father, we depreciate the riches of His grace, for "we have redemption by His blood, even the forgiveness of sins, according to the riches of His grace" (ver. 7). If in uncertainty we do not enjoy this grace, we do not really acknowledge it; and in order to do so we must give ourselves up entirely to God, to the power of the love of Him who tells us to come inside. Here we may remark, that the Spirit, whilst declaring to us very plainly what is the means of our salvation, does not reason upon it as elsewhere, making known to us its character and its sufficiency; but He speaks of it as of a privilege that we possess; he tells us what we have in Christ, before sheaving what belongs to those who enjoy the effect of this redemption. We have redemption; and instructed in all things, we wait for the redemption of the body, in order to enjoy it. The only thing that we have to do is to contemplate the riches of the grace of God; this will be a means of drawing us close to Him.
We have seen in the preceding verses the purposes of God with regard to us, and the means which He employs to render us partakers of them, namely, Redemption through His blood, according to the riches of His grace. Now what we have before us is the portion we have now here below; the understanding of the mystery of God.