Professor Richard F. Gombrich has pointed out in several publications, and in his recent Numata Visiting Professor Lectures at the University of London, School of Oriental and African Studies (SOAS), that the literal meaning of "upādāna" is "fuel". He uses this to link the term to the Buddha's use of fire as a metaphor. In the so-called Fire Sermon ("Āditta-pariyāya") (Vin I, 34-5; SN 35.28) the Buddha tells the bhikkhus that everything is on fire. By everything he tells them he means the five senses plus the mind, their objects, and the operations and feelings they give rise to — i.e. everything means the totality of experience. All these are burning with the fires of greed, hatred and delusion.