He who works with his hands is a laborer. He who works with his hands and his head is a craftsman. He who works with his hands, his head and his heart is an artist
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself.
Therefore, all progress depends on the unreasonable man
The line separating good and evil passes not through states, nor between classes, nor between political parties either, but right through every human heart
The first 90% of a project or task often takes only 10% of the total time and effort, while the final 10% can require the remaining 90% of the time and effort