motto xunzi: Confucius said "I hear I forget, I see I remember, I do I understand". Quora Edgar Dale, his "Cone of Learning", in a duration of 2 weeks time we remember only: 10% of what we read, 20% of what we hear, 30% of what we see, 50% of what we hear and see, 70% of what we say and write and 90% of what we actually participate in.