Letter to a Friend
Letter to a Friend - Suhrllekha, bshes pa'i spring yig, by Nagarjuna.
Nagarjuna (1st - 2nd century A.D.) wrote his celebrated poem Letter to a Friend as a letter of advice to a king with whom he was friendly. Despite its short length (only 123 verses), it covers the whole Mahayana path with unusual clarity and memorable imagery, and it is for this reason that it is widely quoted by Tibet's great masters and scholars in the many commentaries they have written on the Buddhist path.