The changes in our life must come from the impossibility to live otherwise than according to the demands of our conscience.
The world is changed by your example, not by your opinion.
The design of a system should be guided by the principle of least surprise, where the behavior of components is intuitive and predictable.
The alternation of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.