A monk asked Tung-shan: “When cold and heat come along, how can I avoid them?”
Tung-shan said: “Why not go where there is neither cold nor heat?”
“Where is there neither cold nor heat?”
Tung-shan said: “When it is cold, let the cold kill you. When it is hot, let the heat kill you.”

– from my daily zen calendar, I should meditate on this all winter.