It seems that the deeper scientists probe into the forces of nature, the less sure they are of how they really work. In the late 1900s, physicists thought they understood nearly everything on the basis of a few axioms. But since the advent of quantum mechanics, it's all been downhill in terms of understanding how nature works fundamentally. For example take the statement of Nobelist Richard Feynman that goes something like 'if you think you understand quantum mechanics, you haven't got a clue'.
No one really knows if eigenfunctions (i.e. waves) exist or just particles (Feynman was inclined towards just particles), or both exist (e.g. Bohm), or only waves (Hindu concept of Maya). Same goes for strings, extra dimensions, and gravity vs. space distortion, or even if this is the only universe, or what constitutes dark matter and dark matter, which is most of our universe, or are they just a figment of incorrect math.
Take the concept of entanglement. It's really just a word to cover up the fact that physicists have no idea what it really is. Or consciousness-something we all experience- they ain't got a clue- well they have a few contradictory clues or assumptions, but no real understanding
The only way to become more certain is to stop learning physics. But that ain't no fun. What's fun is that no one in the world understands the fundamentals any better than anyone else. Ahything could be true.