As an instructor, when new students begin to train with you, can you usually tell who will stick with it up to the higher belts and who'll give up in the early days? Have you ever been wrong? I once had a young boy begin training with us and he was brilliant, he had a natural talent for karate and he soaked up what he was taught like a sponge. I always swore he'd make 1st dan but he gave up as soon as he graded to green belt. Another boy joined us years ago, big lad, very clumsy, uncoordinated, easily frustrated...I gave him 2 months...this was five years ago and he's currently 1st kyu training for 1st dan. I've given up guessing but sometimes I just can't help secretly betting in my head who will give up and who will go all the way.