Education (of the heart) is important, knowledge on its own is useless and dangerous. Sometimes when the rain which is the Divine Blessing fall on the flowers, their scent rise; when the rain fall on dirty places, bad smell rise. Knowledge is the same, if it is entered in an educated heart, its scent will cover the world, and if it is entered in uneducated or corrupt heart, then it corrupts the world [1].
[1] Sahifeyeh Imam, Vol. 14, Page 40.