Knowledge is meant to nourish your faith, not to fill your belly with the world's goods.
Whoever sold off restraint, learning, and devotion
gathered up a harvest, then watched it burn to ash.
Explanation: The 'harvest' stands for worldly gain amassed by trading away one's piety, gain that ultimately comes to nothing.
Original · Persian
حکمت شمارهٔ ۴
علم از بهر دین پروردن است نه از بهر دنیا خوردن.
هر که پرهیز و علم و زهد فروخت
خرمنی گرد کرد و پاک بسوخت