每个行为都有它的乐趣和它的代价。
真相很少是纯粹的,也从不简单。
The dead are our teachers, if we know how to listen.
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.
Leadership is about inspiring people to do things they never thought they could.