Onelearns by doing the thing; for though you think you know it, you have nocertainty until you try.

They know enough who know how to learn.

All the power that we exercise over others depends on thepower we exercise over ourselves.

Patience is bitter, but its fruit is sweet.

The loftierthe building the deeper the foundation must be.

Ultimately, the only power to which man should aspire isthat which he exercises over himself.

There is no knowledge that is not power.

Knowingthat everything's futile but still fighting, still raging against the dying ofthe light that's what motivates me all the time ... If you hold that sense offutility in your head for too long, it can begin to eat into you. You canstill be aware of it

Accomplishmentof purpose is better than making a profit.

No man everdid a designed injury to another, but at the same time he did a greater tohimself .

Constant repetition carries conviction.

Anyonewho conducts an argument by appealing to authority is not using his intelligence,just his memory.