How to understand "请勿复敢见矣"?
in classical chinese, "i" is rarely used. it's replaced by other character / word.

請勿復敢見矣 is "I do not dare to ask for meeting you anymore" (imo, this translation is a very good one)

請 - replaced "i"

勿 - do not

復 - anymore

敢 - dare to

見 - ask for meeting you

in the same sentence, 弟子齊宿而後敢言 is roughly:

i used to respect (you, mr 孟), therefore i dare to persuade

弟子 - literally "disciple", it replaced "i"

齊宿 - in 漢 dynasty, it was interpreted as "used to respect"¹

而後 - therefore

敢言 - dare to persuade

no "i", get it?

¹齊﹒敬也﹒宿﹒素也: