The sun is very powerful. Staring at it during an eclipse will hurt your eyes just as staring at it on a regular day will hurt your eyes. The difference is during an eclipse theres a greater temptation to look at it and a false belief it wont be as bright.
During totality its safe to look at it but be aware totality is short and will end suddenly
"Something's wrong! Murder isn't working and that's all we're good at." ~Futurama