There is no exercise better for the heart than reaching down and lifting people up.
What makes this observation cut deeper than simple charity is its physiology of the matter—Holmes isn't being merely poetic when he speaks of the heart. The act of helping another person, especially one struggling, requires us to lower our own stance, to make ourselves vulnerable in the moment of reaching. That vulnerability, that willingness to bend down rather than remain elevated, actually rewires us; a nurse who spends years lifting elderly patients from bed to chair doesn't just perform compassion, but becomes a more compassionate person. The heart strengthens not through receiving help, but through the sometimes inconvenient, always humbling business of giving it.