Improvement. The spirit of self-advancement. Progress. Development.
Improvement
Go to a better direction, the good state
The spirit of self-advancement
The thing which I was not satisfied with a current state and was able to choose, a heart I get together and aim at the high thing, and to make an effort
Progress
The progress says qualitative improvement
Development
Development is that force and the power of things improve, and there is the thing that quantitative, opening says with qualitative improvement
