| I have been able to get a sort of visualizable flash of insight in 4 dimensions, when I had been thinking about quaternions for over a month for 8 hours a day. |
| I uncovered the secret of simultaneity to be something unfathomable and impenetrable, not quite conceivable or visualizable, related with the infinite, with eternity. |
| Human beings are primarily spoken the world in order to make it a visualizable totality of objects. |
| Kinematic ideas, which appeared frequently in mathematics of the period, provided a clear and visualizable means for the generation of geometric magnitude. |
| With the abandonment of the ether theories following the rise of relativity theory, this visualizable model ceased to have validity. |
