Therefore, just as you received Christ Jesus as Lord, continue to live your lives in him, rooted and built up in him and firm in your faith just as you were taught, and overflowing with thankfulness.
[Col 2:6-7 NET]
It is a goodly sight to see a noble tree; and we may gather from the strength of the tree the strength of the soil, for only in deep and good soil will such trees grow. But look at the trees of righteousness, the planting of the Lord, that he may be glorified! What depth and richness there is in the heavenly soil in which they are planted! View the true, real, and eternal Sonship, the glorious Deity of Jesus, and view that Deity in union with his suffering humanity! What soil is there! What breadth to hold thousands and thousands of noble trees! What depth for them to root in! What fertility to clothe them with verdure and load them with fruit! The most fertile natural soils may be exhausted, but this is inexhaustible. For can Deity be exhausted? Is it not its very nature to be infinite? And when we view what our most blessed Lord now is at the right hand of God, what a perfect and complete Savior he is for the soul to lay hold of!
Again, as the more deeply and widely that a tree spreads its roots into the soil, the more nourishment does it suck up; so it is with a believing heart. The more Christ is laid hold of by faith, the more the soul roots down into him; and the firmer hold it takes of him, and the more deeply it roots into him, the stronger it stands, and the more heavenly nourishment it draws out of his fullness. This is being “rooted in Christ.” A religion must always be a shallow, deceptive, and ruinous religion if it has not Christ to root in, for then it must be rooted in self. But if it is planted and rooted in Christ, then there is a sufficiency, a suitability, a glorious fullness in him in which the soul may take the deepest root, and not only for time but for eternity; for such a faith can never be confounded, such a love never perish, and such a hope be never put to shame.