Peter Adamson from Kings College London has a great podcast - The History of Philosophy With No Gaps - which throws up some amazing quotes:
None of us knows anything, and instead we make do with belief.
I like the humbleness of it. Learn - but don’t get complacent about what you think you know.
And apparently Democritus was known as the laughing philosopher because he thought you should be cheerful at all times…which chimes with me!