“To an earth stained hand. The nails are splintered and give good purchase”
“Earth stained” grandfathers rural work, weathered by the environment, or shows how down to earth and pure he is, juxtaposing the world of materialism the grandson is escaping
“Hand” affectionate, supportive
“Good purchase” metaphor, grandfathers wisdom benefits grandson and his climb towards self discovery
caesura, grandson takes time to absorb the lessons he is learning