When I was studying, I had a problem with a question in class and I asked the teacher and he, instead of giving me an answer or a tip, told me “Naturally I can explain it to you, also a second and third time, but soon you will forget it, first try better to find the solution by yourself, if you succeed you will have understood it and you will never forget it for the rest of your life”. It was a very good advice until now, almost 60 years after it. The need of help from others is always good, but only as last resource.