The Three Stages of Cultivation pin set is inspired by a letter from Bruce Lee's archive. In the letter, he sends notes and specs to his friend George for the fabrication of 3 plaques he wanted to have made for his gym. The plaques outline his philosophy of The Three Stages of Cultivation: Partiality, Fluidity, and Emptiness. Carry these symbols with you with this pin set from Pintrill! Each Gold plated brass pin with hard enamel includes a black rubber pin clutch, and all three come packaged in a collectors card featuring the letter.