Importance of math to biology

"... I have deeply regretted that I did not proceed far enough at least to understand something of the great leading principles of mathematics, for men thus endowed seem to have an extra sense".

── Charles Darwin

在ecology課本發現的
光這句話就足以讓我覺得達爾文是個偉大的生物學家

I don't understand why there is few people mentioning such an insight from one of the greatest biologists who ever lived.