Matthew Henry and continuators on Proverbs 18:15

15 The heart of the prudent getteth knowledge; and the ear of the wise seeketh knowledge.

Note, 1. Those that are prudent will seek knowledge, and apply their ear and heart to the pursuit of it, their ear to attend to the means of knowledge and their heart to mix faith with what they hear and make a good improvement of it. Those that are prudent do not think they have prudence enough, but still see they have need of more; and the more prudent a man is the more inquisitive will he be after knowledge, the knowledge of God and his duty, and the way to heaven, for that is the best knowledge. 2. Those that prudently seek knowledge shall certainly get knowledge, for God never said to such, Seek in vain, but, Seek and you shall find. If the ear seeks it, the heart gets it, and keeps it, and is enriched by it. We must get knowledge, not only into our heads, but into our hearts, get the savour and relish of it, apply what we know to ourselves and experience the power and influence of it.