| Knowledge is an unending adventure at the edge of uncertainty. |
| The grain of real knowledge is concealed in a vast deal of esoteric chaff. |
| Knowledge of what is does not open the door directly to what should be. |
| Depend upon it there comes a time when for every addition of knowledge you forget something you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones. |
| The more we know, the better we realize that our knowledge is a little island in the midst of an ocean of ignorance. |
| All our knowledge originates in opinion. |
| Knowledge will appear in turn the merest ignorance to those who come after us. Yet it is not to be despised, since by it we reach up groping fingers to touch the hem of the garment of the Most High. |
| Human knowledge is personal and responsible, an unending adventure at the edge of uncertainty. |
| For also knowledge itself is power. |
| The greatest weapons in the conquest of knowledge are an understanding mind and the inexorable curiosity that drives it on. |