Knowledge

Knowledge is not what is memorised.
Knowledge is what benefits.
-Iman Shafi'

This is a good quote. In my profession, I always remind my students about knowledge. The right way to study is not by memorizing but it all about understands. Once you understand, the knowledge will be beneficial to you and stay longer in your memory box. But if you just memorize without really understand what's going on, it can just slip away easily from you.