When the popular Nestorianism of the Syrians was condemned at Ephesus (431) it began to gravitate eastwards, Nisibis becoming its eventual headquarters; but Edessa and the western Syrians refused to bow to the Council of Chalcedon (45r) when it condemned Monophysitism.
The geography of the Avesta points both to the east and the west, particularly the north-west of Iran, but with a decided tendency to gravitate towards the east.
Or, we gravitate toward anecdotes like, "I take my vitamin C every day and haven't had a cold in year."
For instance, in the history of mechanics it was first inferred from some that all terrestrial bodies gravitate, and then from these as some that all ponderable bodies, terrestrial and celestial, gravitate.
If that were so, no one need be ashamed to profess it; and the younger generation of Frenchmen began to gravitate back to the Church.