Sa'di says

On the Effect of Education

A philosopher was advising his children as follows:
"Dear to me as life! acquire knowledge; for there is no reliance to be placed in worldly possessions, either of land or money. You cannot take rank abroad with you; and silver and gold on a journey occasion risk, and either the thief may carry it off at one swoop, or the owner will gradually expend it: but knowledge is an ever-springing fountain, and a source of enduring wealth, and if an accomplished person ceases to be wealthy it matters not, for his knowledge is wealth existing in his mind itself. Wherever the accomplished man goes he is esteemed, and is seated in the place of honour, while the man without accomplishments has, go where he will, to pick up scraps and endure raps.

'Tis hard t' obey for those who have borne rule,
Or fortune's minions in rough ways to school.

In Syria once commotions so arose
That discord shook each person from his hearth.
Eftsoons the king his vazirship bestows
On peasants' sons, wise, though of lowly birth:
The vazir's dullard children in their stead,
Through town and hamlet humbly beg their bread.

Learn what thy father knew, if thou wouldst hold
his place. In ten days thou wilt spend his gold.