Translation of "أدركه" in English

كان هذا أول وأكبر شيء أدركه.

Really, there is only self-management.

كن ما لم أكن أدركه هو أن المتصيدون لي كانوا يدخلون في ذهني

But what I didn't realize is that my trolls were inoculating me,