“Your comrades are there to make up for what you cannot do. And to prevent you from ignoring things that you actually might have been able to do.”-Itachi Uchiha
“…Knowing who I actually am is the key to reach perfection… Because that means knowing what I can and cannot do.”
“That’s what a loser would say. Isn’t acknowledging what you can’t do the same as giving up?”
“No. It means… to forgive yourself for what you aren’t able to do.”
An exchange between Itachi and Kabuto during their fight. Definitely a good take on the moral of knowing your limits.
“No matter who you are… you do not know what kind of human you are until the very end. One realizes their true nature at the moment of death.”-Itachi Uchiha
“People live their lives bound by what they accept as correct and true. That’s how they define ‘reality’. But what does it mean to be ‘correct’ or ‘true’? Merely vague concepts… their ‘reality’ may all be a mirage. Can we consider them to simply be living in their own world, shaped by their beliefs?”-Itachi