Let me open another can of worms: The notion that positing a theory requires 'faith' is completely incorrect, and also falls squarely outside of the scientific method. A theory is quite simply an attempt to rationally explain a phenomenon that is otherwise unknown, including testable methods or predictions. It never relies on faith or dogma. That automatically makes it non-scientific.
A good example is Einstein's theory of general relativity. Even nowadays we're still conducting tests he predicted would have a certain outcome (and we clearly couldn't test when he presented the theory). See:
https://www.space.com/supermassive-b...elativity.html
https://www.space.com/41077-einstein...ives-test.html
He didn't use 'faith' to predict those outcomes, he applied his theory to different scenarios (even if they couldn't be tested at the time) and derived what the outcomes should be if his theory was correct.