Charles H. Spurgeon on Psalms 141:6

They shall hear my words; for they are sweet. This is especially true of all the words which David spake by inspiration, or the Spirit of God spake to him; articulately in his book of Psalms; concerning the Messiah, the covenant of grace, and the blessings of it; of the rich experiences of grace he had, and the several doctrines of the gospel declared by him; which were sweet, delightful, and entertaining to those who have ears to hear such things; or whose ears are opened to hear them, so as to understand them and distinguish them, but to others not. —John Gill.