One of my favourites from the Rambam in Hilchos Talmud Torah 3:10.
Unfortunately somewhat out of fashion these days.
“Anyone who decides to be engaged in Torah [study] and not to work, and will be supported by Tzedaqa – this person desecrates God’s name (Chillel es Hashem), degrades the Torah, extinguishes the light of our faith, brings evil upon himself and forfeits life in Olam haBa (The world to come); since it is forbidden to derive benefit from the words of Torah in this world. The Rabbis said (Avot 4:5): Anyone who derives benefit from the words of Torah in this world, forfeits his life in Olam haBa. They further commanded and said: (Avot 4:5) Do not make them [the words of Torah] a crown to magnify yourself or an axe with which to chop. They further commanded, saying: (Avot 1:10) Love work and despise positions of power (Rabbonus). And: (Avot 2:2) Any Torah which is not accompanied by work will eventually be nullified and will lead to sin. Ultimately, such a person will steal from others.”