[‘Abdu’l-Bahá said]: "Strange indeed that after 20 years of training in colleges and universities man should reach such a station wherein he will deny the existence of the ideal or that which is not perceptible to the senses. Have you ever stopped to think that the animal already has graduated from such a university? Have you ever realized that the cow is already a professor emeritus of that university? For the cow without hard labor and study is already a philosopher of the superlative degree in the school of nature. The cow denies everything that is not tangible, saying, "I can see! I can eat! Therefore, I believe only in what is tangible!" Then why should we go to the colleges? Let us go to the cow.