Fear cannot be banished, but it can be calm and without panic; it can be mitigated by reason and evaluation.
Vannevar BushIf scientific reasoning were limited to the logical processes of arithmetic, we should not get very far in our understanding of the physical world
Vannevar BushThe question of whether a device will come into being depends upon three things: first, whether there is a practical use for it that warrants its development and manufacturing costs; second, whether the laws of physics applying to the elements available for its design allow the attainment of the needed ranges, sensitivities, or the like; and third, whether the pertinent art of manufacture has advanced sufficiently to allow a useful embodiment to be built successfully.
Vannevar Bush