All truth, in the long run, is only common sense clarified.


"On the Study of Biology" (1876).

Google Books https://books.google.com/books?id=4cl5c4T9LWkC&pg=...


All truth, in the long run, is only common sense clarified.

All truth, in the long run, is only common sense clarified.

All truth, in the long run, is only common sense clarified.

All truth, in the long run, is only common sense clarified.