you will suffer from the same reflect in return 是什麼意思?

傷人十分自傷七分，你必須承受自己的過失而遭受報復，reflect 反作用力，in return 回報，回復等

reflect字本義可指"反射"/"反應"
所以這裏對應是前句的"mean to the others"惡意對人的行為或者可能是指對人的反應/回應/情緒/行動。
reflect(第二音節重聲)是動詞 = 反射/反映
reflect(第一音節重聲)是名詞 = 反應/即時反應

You will suffer from the same reflect in return意思是
你自己亦必然會受到同樣的惡待(別人對你的反應)報應。[由於中文"報應"這詞一般是用於咒詛人，所以這句的中文意思可以調節一下免用"報應"這詞已經可以表達"終必自作自受"的意思。

mean(1)of your behaviour unworthy; discreditable;unacceptable; unforgivable:-eg:-What a mean revenge !
mean(2)of person, your character, etc. is having or showing a fondness for your behaviour;-eg:- a mean rascal.Don't be so mean to your friends,or others.Don't treat him unkindly, stubbornly,etc. You are a mean-minded sort of fellow Or people.
mean(3)lacking in generosity; selfish, unacceptable, unforgivable; stubborn
eg:-Your behaviour is rather mean over filial piety 不孝順父母親,,money, unacceptable and unforgiving to Others.!!!!!
(2)It should be reflection or reflexion noun, esp. an image reflected in a mirror on seeing your unacceptable, unforgiving, unthoughtfulness, unconsideration , in a mirror. !!!!!