Adams on Psalm 84:11 & 85:8

84:11 No good thing will he withhold, etc This is an immense fountain; the Lord fill all the buckets of our hearts at the spring, and give us capacious souls, as he hath a liberal hand.

85:8 I will hear, etc The eye as a mere organ of sense must give place to the ear. Therefore it is wittily observed, that our Saviour commanding the abscession of the offending hand, foot and eye, (Mr 9:43-47), yet never spake of the ear. If thy hand, thy foot or thine eye, cause thee to offend, deprive thyself of them; but part not with thine ear, for that is an organ to derive unto thy soul's salvation. As Christ says there, a man may enter into heaven, lamed in his feet, as Mephibosheth, blind in his sight, as Barzillai, maimed in his hand, as the dry handed man in the gospel; but if there be not an ear to hear of the way, there will be no foot to enter into heaven. If God be not first in the ear, he is neither sanctifiedly in the mouth, nor comfortably in the heart. The Jews had eyes to see Christ's miracles, but because they had no ears to hear his wisdom, therefore they had no feet to enter into his kingdom. The way into the house is by the door, not by the window: the eye is but the window of the heart, the ear is the door. Now Christ stands knocking at the door, not at the window. Re 3:20. And he will not come in at the window, but at the door. "He that entereth in by the door is the shepherd of the sheep." Joh 10:2. He comes now in by his oracles, now by his miracles. "To him the porter openeth; and the sheep hear his voice" Joh 10:3. The way to open and let him in is by the door; to hear his voice. There was a man in the gospel blind and deaf; blind eyes is ill; but deaf ears, worse. It is bad to have the eyes seeled (Seel, to close up: a term in falconry), but worse to have the ears sealed up. Open your ears therefore to this heavenly voice. Bernard hath this description of a good ear: Which willingly hears what is taught, wisely understands what it heareth, and obediently practises what it understandeth. O give me such an ear, and I will hang on it jewels of gold, ornaments of praise.

As quoted in Spurgeon's Treasury of David.