What does the Bible say about the heart and the ear?

Proverbs 18:15 states that 'the heart of the prudent getteth knowledge; and the ear of the wise seeketh knowledge.' This verse emphasizes the importance of both knowing and desiring wisdom. The heart represents our inner being and understanding, while the ear signifies our receptiveness to hearing and absorbing truth. In the context of salvation and spiritual understanding, these two faculties illustrate the necessary interplay between internal transformation by God and the external hearing of His Word through preaching.