Mass can transfer to energy and back by changing from a spike in the probability field to a transfer of probability to other probability fields. Gravity is seen as a warping of spacetime in on itself. It is a form of macroscopic geometry. MPFs tend to accumulate in areas of higher warping of spacetime. This in turn tends to increase the degree of warping of spacetime.
Gravity is geometry of the macroscopic.
It attracts both the peaks and troughs of the probability fields. Warping of spacetime tends to be small in most areas of the universe and is accentuated in areas of dense quantities of MPFs. In fact, in some regions, the density of MPFs becomes so strong that they turn space in on itself to create an area in which spacetime bends to infinity. I seek to define the strong force as a microscopic geometry which is the inverse of gravity. This is geometry folded in on itself to the point that the probability fields enclosed within cannot escape their confinement.