Miyamoto Musashi

When I reached thirty I looked back on my past. The previous victories were not due to my having mastered strategy. Perhaps it was natural ability, or the order of heaven, or that other schools' strategy was inferior. After that I studied morning and evening searching for the principle, and came to realise the Way of strategy when I was fifty. Since then I have lived without following any particular Way. Thus with the virtue of strategy I practise many arts and abilities — all things with no teacher.