JMNT(i)
52 You see, they had not put the pieces together on the [situation of] the loaves of bread, so as to understand or grasp the meaning, but to the contrary, their heart (= the core condition of the group) was continuing being in the condition of having been petrified (made to be a stony concretion; or: made thick and hardened like calloused skin; or: = [their minds] were closed).