And she had a sister called Mary, which also sat at Jesus’ feet, and heard His word. But Martha was cumbered about much serving, and came to Him, and said, Lord, dost thou not care that my sister hath left me to serve alone? bid her therefore that she help me. And Jesus answered and said unto her, Martha, Martha, thou art careful and troubled about many things: But one thing is needful: and Mary hath chosen that good part, which shall not be taken away from her. – Luke 10:39-42

Imagine not that to sit at Jesus’ feet is a very small, unmeaning thing. It means peace, for they who submit to Jesus find peace through His precious blood. It means holiness, for those who learn of Jesus learn no sin, but are instructed in things lovely and of good repute. It means strength, for they that sit with Jesus, and feed upon Him, are girded with His strength; the joy of the Lord is their strength. It means wisdom, for they that learn of the Son of God understand more than the ancients because they keep His statutes. It means zeal, for the love of Christ fires hearts that live upon it, and they that are much with Jesus become like Jesus, so that the zeal of the Lord’s house eats them up. If we say that in an army the one thing needful is loyalty to the sovereign, we know what that means; for the loyal solider will be sure to be obedient to his officers, and if attached to his queen, he will be brave in the day of battle and do his duty well. If we said that the one thing needful in a family was love, we should not have required a small thing; for love will place husband and wife in their true position; love will produce obedience in children, and diligence in servants. Let love permeate everything, and other virtues will grow out of it, as flowers spring from the soil. So, when we say that sitting at Jesus’ feet is the one thing needful, we have not uttered a mere truism: it comprehends a world of blessings.

And here would I address a word to the church of God in this country at this present time. She, too, is as Martha, cumbered with much serving. It were her wisdom, and her strength, if she would become more like Mary, and sit at Jesus’ feet. Just now we need revival. Oh, that God would send it! Oh, for a mighty flood of spiritual influences, that would bear the stranded churches right out into a sea of usefulness. But how can we get revival? We shall have it, brethren, when we commune with Christ. When the saints habitually sit at Jesus’ feet they will be revived, and of necessity the revival will spread from them, and the hearts of sinners will be touched. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1015.cfm