One of the related allusions is "Buddha's flowers and leaves laugh". It probably means that Sakyamuni didn't say a word to millions of disciples at Lingshan meeting, but just picked a flower gently and showed it to the public. Everyone didn't understand the secret, only the respected Ye Jia got the message, and Zhan Yan smiled knowingly.
Ye Jia got the message, understood the true meaning of life and the secret of the universe, and smiled from the heart. Maybe all this is a state of mind. If you have nothing in your heart, you can spend a world. Understand the true meaning of the life universe, then a flower and a grass is the whole world, the whole world is empty, and everything goes without saying.
Extended data:
Buddha said: a flower is a world, a grass is a day, a leaf is a Buddha, a sand is a blessing, a pure land is a smile and a dust. All this is a state of mind. If the heart has nothing, it can take a flower and a world, and a grass can understand it one day. A flower and a grass are the world, the world is as empty as a flower and there are buddhas everywhere, and all living beings are buddhas.
Tang Wo wrote about the San Xiao courtyard of Tuolin Temple in Lushan Mountain: the bridge spans the tiger stream, three religions and three sources, and three people San Xiao; Lotus opens a monk's home, one flower is the world and one leaf is the Buddha.
References:
A World in a Flower-Baidu Encyclopedia