What you’re supposed to do when you don’t like a thing is change it. If you can’t change it, change the way you think about it. Don’t complain.
Source documented
From the essay “Complaining” in Maya Angelou’s Wouldn’t Take Nothing for My Journey Now (1993), where she recounts advice from her grandmother, Annie Henderson. This quote about change, mindset and positive thinking encourages taking action where possible and changing your perspective when circumstances cannot be changed.