In the evening our gentleman-farmer, and two others, entertained themselves and the company with a great number of tunes on the fiddle. Johnson desired to have ‘Let ambition fire thy mind,’ played over again, and appeared to give a patient attention to it; though he owned to me that he was very insensible to the power of musick. I told him, that it affected me to such a degree, as often to agitate my nerves painfully, producing in my mind alternate sensations of pathetick dejection, so that I was ready to shed tears; and of daring resolution, so that I was inclined to rush into the thickest part of the battle. ‘Sir, (said he,) I should never hear it, if it made me such a fool.’
Boswell, Life of Johnson.