For we are members of His body, of His flesh, and of His bones. – Ephesians 5:30

He that saith he abideth in Him ought himself also so to walk, even as He walked. – 1 John 2:6

We must take care that the love that was round about Christ’s feet, is always shining on our path. We must go about doing good, following in the steps of our Lord. It would be giving the lie to this doctrine (of our union with Christ) if we lived in sin; for, if we are one with Him, then we must be in this world even as He was; and being filled with His Spirit, must seek to reproduce His life before the world. As we delight our hearts in the glorious truth that “we are members of His body, of His flesh and of His “bones,” may we determine to live as those who are this closely joined to the Lord of life!

“Lord Jesus, are we ONE with Thee?
Oh, height! Oh, depth of love!
With Thee we died upon the tree,
In Thee we live above.

“Oh, teach us, Lord, to know and own
This wondrous mystery,
That Thou with us art truly ONE,
And we are ONE with Thee!”

Our heaven lies in our union with Him. Ay, and sometimes when we realize our oneness with Christ, we can hardly think that we should be happier in heaven than we are now! May you all have this enjoyment! “Seek ye the Lord while He may be found, call ye upon Him while He is near.” If you seek Him with all your heart, you will surely find Him; and very soon you also will be brought into “living, loving, lasting union” with Christ. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/2244.cfm