Whatever you do, you must never let the voice in your head control the brain in your heart.

You can't reason with your heart; it has its own laws, and thumps about things which the intellect scorns.

Go to your bosom; Knock there, and ask your heart what it doth know.

In a conflict between the heart and the brain, follow your heart.

The speech of my heart will be carried on in murmurings of a song.

Human knowledge consists not only of libraries of parchment and ink - it is also comprised of the volumes of knowledge that are written on the human heart, chiselled on the human soul, and engraved on the human psyche.