Full Idea
Quantum mechanics teaches us not to think about the world in terms of 'things' which are in this or that state, but in terms of 'processes' instead.
Gist of Idea
Quantum mechanics deals with processes, rather than with things
Source
Carlo Rovelli (Reality is Not What it Seems [2014], 04)
Book Reference
Rovelli,Carlo: 'Reality is Not What it Seems', ed/tr. Carnell/Segre [Penguin 2016], p.116