From a certain manga that is unexpectedly interesting:
Plot: Currently, the temporary teacher is being replaced by the arrogant new teacher(Looks down on the temporary teacher, commenting that he is nothing, and that if he is a teacher, then the job is nothing as well), and some students are complaining...
New Teacher: "Shut up. 'To silently abide by the school rules', if you cannot even follow such a basic rule, don't think that that works in society."
Temporary Teacher: "I wanted to just do a simple greeting, but forget that.
Towards you guys who will move into society, I only have one thing to say to you.
'Don't think that following rules will work in society!'
Rules were not made for you, but for 'the one who made it', and the 'reality' and 'future' it commands will often become your 'enemy', so if there is a 'future' you desire, fight for it, fight against 'reality' and pummel it to the ground, to hone your weapon, to live with the rules only you have, and to make reality accept these rules. Doing so will make the future truly yours."
Temporary Teacher(with a smirk): "Sorry, guess a teacher like me has nothing else to teach them, so I leave them to you now, the so-called 'Rules of Society', an easy deal right?"