“My mind may be American but my heart is British.”

"Fidelity"
Begin to Hope (2006)
Context: I never loved nobody fully
Always one foot on the ground
And by protecting my heart truly
I got lost in the sounds
I hear in my mind
All these voices
I hear in my mind all these words
I hear in my mind all this music
And it breaks my heart
It breaks my heart...

Source: The Life of Pasteur (1902), p. 163
Context: I confess frankly, however, that I am not competent on the question of our philosophical schools. Of M. Comte I have only read a few absurd passages; of M. Littré I only know the beautiful pages you were inspired to write by his rare knowledge and some of his domestic virtues. My philosophy is of the heart and not of the mind, and I give myself up, for instance, to those feelings about eternity which come naturally at the bedside of a cherished child drawing its last breath. At those supreme moments, there is something in the depths of our souls which tells us that the world may be more than a mere combination of phenomena proper to a mechanical equilibrium brought out of the chaos of the elements simply through the gradual action of the forces of matter.

Source: Way of the Peaceful Warrior: A Book That Changes Lives

Half of My Heart
Song lyrics, Battle Studies (2009)
Source: John Mayer - Battle Studies
Context: I was born in the arms of imaginary friends,
Free to roam, made a home out of everywhere I've been.
Then you come crashing in, like the realest thing,
Trying my best to understand all that your love can bring.Oh half of my heart's got a grip on the situation;
Half of my heart takes time.
Half of my heart's got a right mind to tell you
That I can't keep loving you (can't keep loving you)
Oh, with half of my heart.

"Doctor, Doctor, Cut My Throat" (August 1972), in The Tragedy of the Moon (1973), p. 153
General sources

https://twitter.com/wise_chimp/status/1488946174321205253?s=21

Source: A Return to Love: Reflections on the Principles of "A Course in Miracles"

Source: Emma