What do these quotes mean and how do they connect the world around us?

Question

"minds that don't change are like clams that don't open."

"selfishness is not living as one wishes to live; it is asking others to live as one wishes to live."

"argue for your limitations, and sure enough, they're yours."

"crusaders for virtue are an awkward embarassment; they force us to make choices either side with them, which is dangerous, or condemn them which leads to self betrayal."

Answer 1

"minds that don't change are like clams that don't open."

--those who don't change their minds are stubborn, unyielding, and headstrong in their beliefs

second quote--being selfish doesn't mean you live the way you want to live it means you want others to live their lives YOUR way