After eight months of the alternative treatment failing to effectively treat his advancing cancer, Marley boarded a plane for his home in Jamaica. During the flight, his vital functions worsened. The flight was diverted to Miami, Florida, where he was taken to Cedars of Lebanon Hospital (now the University of Miami Hospital). He died there shortly afterwards on 11 May 1981, at the age of 36, due to the spread of cancer to his lungs and brain.
I had long before remarked that, in relation to practice, it is sometimes necessary to adopt, as if above doubt, opinions which we discern to be highly uncertain, as has been already said; but as I then desired to give my attention solely to the search after truth, I thought that a procedure exactly the opposite was called for, and that I ought to reject as absolutely false all opinions in regard to which I could suppose the least ground for doubt, in order to ascertain whether after that there remained aught in my belief that was wholly indubitable.
I am in doubt as to the propriety of making my first meditations in the place above mentioned matter of discourse; for these are so metaphysical, and so uncommon, as not, perhaps, to be acceptable to every one.