Artistic mediums go through phases where progress happens really rapidly, and then other moments where it slows down.
When I was a kid, I went through a lot of musical phases, and one was when I'd learn everything that The Beatles ever recorded. After I started drums, I fell in love with their music so much that I just wanted to learn everything.
My parents are both very stylish, so they always encouraged me to explore when it came to personal style. I went through a lot of crazy phases, and I'm still finding myself.
Sleephackers go to bed with sensors on their wrists and foreheads and maintain detailed electronic sleep diaries, which they often share online. To shift between sleep phases, sleephackers experiment with various diets, room and body temperatures, and kinds of pre-sleep physical exercise.
The first of these phases is that of grammar, invented by the Greeks and carried on unchanged by the French. It never had any philosophical view of a language as such.