Sa di

Ch 08 On Rules For Conduct In Life - Admonition 01

Saadi Shirazi was a major Persian poet and prose write of the medieval period.

The amity of princes and the sweet voice of children are not to be trusted, because the former is changed by fancy and the latter in the course of one night.

  Give not thy heart to a sweetheart of a thousand lovers,
  And if thou givest it, thou givest that heart for separation.