There is no poverty except in knowledge
A truly poor person is one who lacks education. Poverty of spirit is the real poverty.
("There is no poverty except in knowledge... If one has acquired it, what does he lack? If one has not acquired it, what has he acquired? (If you have acquired knowledge, what have you lacked? If you have not acquired knowledge, what have you acquired?)" - Nedarim 41a, also: "His father-in-law was wealthy in money but poor in knowledge, and he had a large textile shop" - Agnon, A Guest for the Night, p. 115)
Translation
Expression (Hebrew)
אֵין עָנִי אֶלָּא בְּדַעַת
Definition (Hebrew)
הָאָדָם הֶעָנִי בֶּאֱמֶת הוּא הָאָדָם חֲסַר הַהַשְׂכָּלָה. עֲנִיּוּת הָרוּחַ הִיא הָעֹנִי הָאֲמִתִּי.
("אֵין עָנִי אֶלָּא בְּדַעַת... תַּרְגּוּם: דֵּעָה קָנִיתָ מָה חַסְרַת?דֵּעָה לֹא קָנִיתָ, מָה קָנִיתָ?"-נְדָרִים מא ע"א, וְכֵן: "חָמִיו זֶה הָיָה עָשִׁיר בְּמָמוֹן וְעָנִי בְּדַעַת, וַחֲנוּת גְּדוֹלָה שֶׁל אֲרִיגִין הָיְתָה לוֹ"- עַגְנוֹן/ אוֹרֵחַ נָטָה לָלוּן, 115)