For it pleased the Father that in Him all the fullness should dwell, and by Him to reconcile all things to Himself, by Him, whether things on earth or things in heaven, having made peace through the blood of His cross. – Colossians 1:19, 20

“All fullness” is a wide, far-reaching, all-comprehending term, and in its abundant store it offers another source of delight. What joy these words give to us when we remember that our vast necessities demand a fullness, yea, “all fullness,” before they can be supplied! A little help will be of no use to us, for we are altogether without strength. A limited measure of mercy will only mock our misery. A low degree of grace will never be enough to bring us to heaven, defiled as we are with sin, beset with dangers, encompassed with infirmities, assailed by temptations, molested with afflictions, and all the while bearing about with us “the body of this death.” But “all fullness,” ay, that will suit us. Here is exactly what our desperate estate demands for its recovery. Had the Savior only put out His finger to help our exertions, or had He only stretched out His hand to perform a measure of salvation’s work, while He left us to complete it, our soul had forever dwelt in darkness. In these words, “all fullness,” we hear the echo of His death-cry, “It is finished.” We are to bring nothing, but to find all in Him, yea, the fullness of all in Him: we are simply to receive out of His fullness grace for grace. We are not asked to contribute, nor required to make up deficiencies, for there are none to make up-all, all is laid up in Christ. All that we shall want between this place and heaven, all we could need between the gates of hell, where we lay in our blood, to the gates of heaven, where we shall find welcome admission, is treasured up for us in the Lord Christ Jesus. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0978.cfm