In a recent thread, https://www.physicsforums.com/threads/is-energy-convertible-to-matter.692986/#post-5262460 PF mentor Dalespam said, "Energy is a property, not a "thing" Then Dalespam said, "You can convert things with energy (e.g. a pair of photons) into other things with energy (e.g. an electron and positron). Energy doesn't exist by itself, so you cannot simply convert energy (without an accompanying thing) into matter. This is important because any of the things that have energy also have other properties, such as spin, or momentum, or charge, etc." That struck me as very profound, because it is very tempting to think of energy as something that does exist by itself. I had never heard an explicit statement so direct as Dalespam's, "Energy is a property, not a "thing" I have been mulling on that ever since. Thank you Dalespam for the stimulation. But yesterday, I thought of the Higgs Field with it's mexican hat property of having nonzero energy at zero field strength. Wikipedia says ...the Higgs field—a fundamental field of crucial importance to particle physics theory, first suspected to exist in the 1960s, that unlike other known fields such as theelectromagnetic field, takes a non-zero constant value almost everywhere. - https://en.wikipedia.org/wiki/Higgs_boson If the Higgs field exists everywhere, then it is not a property of the "things" in the region, where "things: can be defined as particles including photons. The things can't be Higgs Bosons because (according to that sme Wikipedia article) Higgs Bosons are produced only when the Higgs field is excited, thus implying that an unexcited Higgs Field exists with no Higgs Bosons. The same mexican hat property is said to apply to the hypothesized inflaton field (https://en.wikipedia.org/wiki/Inflaton). I think it is correct to say that the narrative of inflation theory is that the existence of energy precedes the existence of photons and particles. I'm sorry to have to try to pose a scientific question dependent on the definition of "thing." My question: Are the the Higgs Field and the inflaton fields exceptions to the statement, "Energy doesn't exist by itself"?