Bodhi refers to Tathagata. The original text should be: One flower and one world, one leaf and one Tathagata. The volume of the Brahma Net Sutra says: Lusena Buddha sat in a thousand-leaf lotus and transformed into thousands of Sakyamuni Buddhas, each living in a thousand-leaf world. The Sakyamuni Buddha in each leaf world also transformed into tens of billions. Sakyamuni Buddha, sitting on the Bodhi tree.

One of the related allusions is "Buddha picked up flowers and Kasyapa smiled." It probably means that at the Lingshan meeting, Sakyamuni did not say a word to millions of disciples. He only gently picked up a flower and showed it to the crowd. No one understood the mystery. Only Sakyamuni said a word. Master Ye understood this and smiled knowingly.

Kasyapa understood deeply, understood the true meaning of life and the secret of the universe, and smiled from the bottom of his heart. Maybe this is all a state of mind. If you have nothing in your heart, you can spend a whole world. If you understand the true meaning of life and the universe, then a flower and a grass are the whole world, and the whole world is empty like a flower and a grass, everything is in silence.

Extended information:

Buddha said: One flower is one world, one grass is one paradise, one leaf is one Tathagata, one sand is one bliss, one square is one pure land, one smile is one fate. One thought, one tranquility, all this is a state of mind. If there is nothing in the mind, one flower and one world, one grass and one heaven can be understood. One flower and one grass is the whole world, and the whole world will be empty like flowers and grass. Buddhas are everywhere. Everything Everyone is a Buddha.

Tang Wo sent an inscription on the Three Smiling Courtyard Couplet of Donglin Temple in Lushan Mountain: The bridge spans the Huxi River, the three religions have three origins, and the three people have three laughing words; the lotus blooms in the monk's house, one flower and one world, one leaf and one Tathagata.

Reference materials:

One flower, one world - Baidu Encyclopedia