True beliefs require directed input
Bayes’ Theorem (whether implicitly or explicitly) is what is used to direct “belief energy” towards true beliefs. This is like how a machine needs energy input to continue running.
It may even be more than a metaphor, if we take the idea that Entropy is the tendency of a system to progress towards technical simplicity, and Bayes’ Theorem may be a tool for helping us see the flow of Entropy.