Teaching brings out innate powers, and proper training braces the intellect.
He will often have to scratch his head, and bite his nails to the quick. [To succeed he will have to puzzle his brains and work hard.]
To grow a philosopher's beard.
Mingle some brief folly with wisdom now: To be foolish is sweet at times.
Nos numeros sumus et fruges consumere nati. We are but ciphers, born to consume earth's fruits.
There are words and accents by which this grief can be assuaged, and the disease in a great measure removed.