Joseph Jastrow quotes:

Inventions become perfect by slow improvement, and each step is itself an invention.

The world is as large as the range of one's interests. A narrow-minded man has a narrow outlook. The walls of his world shut out the broader horizon of affairs. Prejudice can maintain walls that no invention can remove.

In that the wisdom of the few becomes available to the many, there is progress in human affairs; without it, the static routine of tradition continues.