"Old minds are like old horses; you must exercise them if you wish to keep them in working order"

In this quote, John Adams compares old minds to old horses, implying that both require routine exercise in order to function correctly. Simply as a horse needs exercise to maintain its strength and dexterity, an old mind requires psychological stimulation to remain sharp and functional. Without workout, both the horse and the mind will end up being sluggish and less reliable. Adams recommends that it is necessary to actively engage and challenge our minds, even as we age, in order to keep them in good working order. This quote serves as a tip to continually learn and grow, despite our age.