Having visual impressions is, of course, necessary for seeing things, but it is not sufficient. What must be added is not anything sensible. And it is precisely this that unlocks the outer world for us; for without this non-sensible something,… — Gottlob Frege Copy Share Image
'Facts, facts, facts,' cries the scientist if he wants to emphasize the necessity of a firm foundation for science. What is a fact? A… — Gottlob Frege Copy Share Image
Having visual impressions is, of course, necessary for seeing things, but it is not sufficient. What must be added is not anything sensible. And… — Gottlob Frege Copy Share Image
...one can hardly deny that mankind has a common store of thoughts which is transmitted from one generation to another. — Gottlob Frege Copy Share Image
It is possible, of course, to operate with figures mechanically, just as it is possible to speak like a parrot: but that hardly deserves… — Gottlob Frege Copy Share Image
The aim of scientific work is truth. While we internally recognise something as true, we judge, and while we utter judgements, we assert. — Gottlob Frege Copy Share Image
It really is worth the trouble to invent a new symbol if we can thus remove not a few logical difficulties and ensure the… — Gottlob Frege Copy Share Image
Every good mathematician is at least half a philosopher, and every good philosopher is at least half a mathematician. — Gottlob Frege Copy Share Image
I compare arithmetic with a tree that unfolds upwards in a multitude of techniques and theorems while the root drives into the depths. — Gottlob Frege Copy Share Image
A scientist can hardly meet with anything more undesirable than to have the foundations give way just as the work is finished. I was… — Gottlob Frege Copy Share Image
