And she had a sister called Mary, which also sat at Jesus’ feet, and heard His word. – Luke 10:39
Only at the feet of Jesus can the divine power be gained which works in us holiness and sanctifies us practically; therefore, as you must be purified or you cannot enter heaven, you must come to Jesus’ feet. Moreover, it is at the feet of Jesus that the soul’s ignorance is removed; and since ignorance concerning ourselves and our God must be taken from us, we must be taught of Him. God is “our light and our salvation;” our light first, and our salvation in consequence. We must have the light. The spiritually blind man cannot enter heaven, he must have his eyes opened, but Jesus alone can work that miracle of grace. Neither can we receive true light except from Him, for He is “the true light, that lighteth every man that cometh into the world;” none are ever enlightened, except by Him. “In Him is light-all light; and the light is the light of men.”
In order to enter heaven, it is necessary that our nature should become like the nature of Christ. This earth is for those who bear the image of the first Adam; but the new heaven and the new earth are for those who bear the image of the second Adam.. We must, by some means, acquire the nature of the second and heavenly Adam, and this must be wrought in us by regeneration, and developed by acquaintance with Him. By sitting at His feet, and beholding Him, we become changed into the same image from glory to glory even as by the Spirit of the Lord. If we reject the Lord Jesus as our trust, teacher, and exemplar, we have no new life, we are not new creatures in Christ, and we can never be admitted within the holy gates where those alone dwell who are fashioned after His likeness. We must, then, sit at His feet…
Woe, woe, woe eternally to the soul that will not sit at the feet of Jesus! He shall be trodden beneath His feet in His anger and crushed in His hot displeasure. God grant that may never be our portion. To sit at Jesus’ feet is the one thing needful then. ~ C.H. Spurgeon
https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1015.cfm