On a certain day, month and year one should observe the ceremony of tree-planting. Thus, one fulfils one's responsibilities, serves one's fellow-beings which not only brings happiness but benefits all.
Dalai LamaThe various features and aspects of human life, such as longevity, good health, success, happiness, and so forth, which we consider desirable, are all dependent on kindness and a good heart.
Dalai Lama