Related posts:
What use would wings be to a man bound in iron fetters? They would only drive him to even greater despair. – Adelbert von Chamisso
The real price of everything, what everything really costs to the man who wants to acquire it, is the toil and trouble of acquiring it. – Adam Smith
There are men who teach best by not teaching at all. – Abraham Flexner
What man-made machine will ever achieve the complete perfection of even the goose’s wing? – Abbas ibn Firnas