Authors:

...neither is it possible to discover the more remote and deeper parts of any science, if you stand but upon the level of the same science, and ascend not to a higher science.

Francis Bacon, Brian Vickers (1996). “The Major Works”, p.146, Oxford University Press, USA
...neither is it possible to discover the more remote and deeper parts of any science, if you stand but upon the level of the same science, and ascend not to a higher science.