"Tell me and I forget, show me and I may remember, involve me and I learn." - Confucius Xunzi, 3rd century BC

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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.