"The Biography of Milarepa" records that Master Milarepa said: "All dharma manifested internally and externally are all scriptures of the Buddha."

There is also a famous saying in Zen Buddhism: "The green bamboos are all Dharmakaya, and the lush yellow flowers are nothing but Prajna."

The above are two sentences from Tantra and Zen respectively. The meanings are very similar. It is said that everything is a Buddhist scripture.