Re: 1984
Reading this passage (again) it dawns that perhaps the "optimistic" 1948 human could not phantom the 2020 "advances":
they had never mastered the secret of finding out what another human being was thinking
...until their developed automated, continuous tracking based profiling
They could be tracked down by inquiry, they could be squeezed out of you by torture
...or simply by offering you to carry around your own personal tracking device, for which you would stand in a queue to buy
They could not alter your feelings
...up to the point that they invented social media and started to foster a bubble culture with stories that amplify themselves, however crazy they seem at the start
...but the inner heart, whose workings were mysterious even to yourself, remained impregnable
widely available to countless (commercial) "service providers", enabling it to be tailored, aka steered without even you yourself realising it.