"Physically and mentally we may be disturbed sometimes, but we have to stand erect on the spiritual platform. I may inform you in the connection that I am at the present moment physically unfit; I am having always a buzzing sound in my brain. I cannot sleep soundly at night, but still I am working because I try to be in my position of spiritual platform."
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(Srila Prabhupada letter, January 15, 1968)
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