וְהָיָה֙ כְּעַרְעָ֣ר בָּֽעֲרָבָ֔ה וְלֹ֥א יִרְאֶ֖ה כִּי־יָב֣וֹא ט֑וֹב וְשָׁכַ֤ן חֲרֵרִים֙ בַּמִּדְבָּ֔ר אֶ֥רֶץ מְלֵחָ֖ה וְלֹ֥א תֵשֵֽׁב׃ (ס)
Pareil à la bruyère dans les landes, il ne verra point venir de jour propice; il aura pour demeure les régions calcinées du désert, une terre couverte de sel et inhabitable.
Akeidat Yitzchak
The Mishnah in Avot Chapter three states that anyone whose theoretical knowledge is greater than the action he takes based on such knowledge is comparable to a tree whose foliage is abundant but whose roots are few. When a wind blows, it will uproot such a tree and turn it upside down as we know from Jeremiah 17,6, "He shall be like a lonely tree in the wasteland, and shall not see when good comes.” On the other hand, he whose practical deeds are greater than his theoretical knowledge is comparable to a tree of little foliage but many roots which cannot be uprooted by all the winds in the world, as is described in the verse of Jeremiah quoted.