The Upadesamrta, or Nectar of Instruction, is an important Gaudiya Vaishnava spiritual text, composed by Rupa Goswami. It was translated into English in its entirety by A. C. Bhaktivedanta Swami Prabhupada, founder acarya of the International Society for Krishna Consciousness.
References
Upadesamrta Wikipedia(Text) CC BY-SA