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“Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it.”
Meaning: In A Brief History of Time, Hawking explained that no amount of experiments can prove a theory permanently, while a single contrary result can disprove it. Carry that into daily life by holding your own opinions as working hypotheses and updating them when better evidence arrives. -
“Anybody who has been seriously engaged in scientific work of any kind realizes that over the entrance to the gates of the temple of science are written the words: Ye must have faith.”
Meaning: Planck observed that every researcher needs trust that the world is orderly and understandable, otherwise no experiment would be worth starting. This is faith in the method, not in dogma. When a project stalls, remind yourself that persistence on a reasonable hypothesis is how most breakthroughs begin.