The paramita [virtue] of enthusiasm works like a miracle ingredient that brings eagerness to all we do. What the bodhisattva commits to isn't a trivial matter. Without enthusiasm, we might push too hard or give up altogether. As the Zen master Suzuki Roshi put it: "What we're doing here is so important we had better not take it too seriously!" The key is finding this balance between "not too tight" and "not too loose," not too zealous or too laid-back.
— Pema Chodron, No Time to Lose