Sometimes I underestimate myself

Sometimes I underestimate myself. I told a student yesterday that I used to study 2-4 hours at the conservatory. But it's not true. When Ilooked back I found out that I studied from 2-6 hours per day. 4-5 hours being the average  I think I always thought (and think) that I study too little, and that that makes memories different. But I did study quite some hours when looking back in my digital agenda from that time.