Eric Temple Bell Quote
The tensor calculus that cost Einstein an effort to master is now a regular part of an undergraduate course in the better technical schools. The subject has been so thoroughly emulsified that even an eighteen-year-old can swallow it without regurgitating. But this does not prove that wither his brain or his stomach is stronger than Einstein's was.
Mathematics: Queen and Servant of Science, A Metrical Universe (p. 211), McGraw-Hill Book Company, Inc. 1951