Whenever learners or those beyond learning awaken the mind, for the first time they plant one buddha-nature. Working with the four elements and five clusters, if they practice sincerely they attain enlightenment. Working with plants, trees, fences and walls, if they practice sincerely they will attain enlightenment. This is because the four elements and five clusters and plants, trees, fences and walls are fellow students; because they are of the same essence, because they are the same mind and the same life, because they are the same body and the same mechanism.