إذا عرفت نفسك فلا يضرك ما قيل فيك
“If you know yourself, then you’ll not be harmed by what is said about you.”
This is beautiful because it could mean anything. They have left you to finish off the sentence for yourself. Depending on who you are and what your situation is, it could be, “Let her know right now that she’s beautiful, that you love her, that you cheated, that your have cancer, that you are depressed, that you need her, that you appreciate her, etc.” But there is one definite meaning to this and it is: let her know right now before it’s too late - before you hurt her even more, before it’s the wrong time and she doesn’t feel the same way, before you lose your chance to let her know how much she means to you, before she’s gone, and so on.