我不是韩语专业的，以下仅供参考。 【너 스스로 限界를 試驗해라】 = 【你自己做边缘检验】（不礼貌语气）。

Experience teaches us that our powers are limited but most people realize that there is a certain limit they can do. but don't give up~! Never stop~! Try to overcome by myself.