The biggest room in the world, is the room for improvement. - Unknown, Source

I don't think much of a man who is not wiser today than he was yesterday.

The never-ending task of self improvement.

The way for a young man to rise is to improve himself in every way he can, never suspecting that anybody wishes to hinder him.

He who asks of life nothing but the improvement of his own nature… is less liable than anyone else to miss and waste life.

Before a diamond shows its brilliancy and prismatic colors it has to stand a good deal of cutting and smoothing. - Unknown, Source

He was always smoothing and polishing himself, and in the end he became blunt before he was sharp.

There's only one corner of the universe you can be certain of improving, and that's your own self.

But you think that it is time for me to have done with the world, and so I would if I could get into a better before I was called into the best, and not die here in a rage, like a poisoned rat in a hole.

To affect the quality of the day, that is the highest of arts. Every man is tasked to make his life, even in its details, worthy of the contemplation of his most elevated and critical hour.