To know many things is ignorance. Pride of scholarship is also ignorance. The unwavering conviction that God alone dwells in all beings is Jnana, knowledge. To know him intimately is Vijnana, a richer knowledge. If a thorn gets into your foot, a second thorn is needed to take it out. When it is out both thorns are thrown away. You have to procure the thorn of knowledge to remove the thorn of ignorance; then you must set aside both knowledge and ignorance. God is beyond both knowledge and ignorance.
Once Lakshmana said to Rama, "Brother, how amazing it is that such a wise man as Vasishtha wept bitterly at the death of his son!" Rama said, "Brother, he who has knowledge must also have ignorance. He who has knowledge of one thing must also have knowledge of many things. He who is aware of light is also aware of darkness."
Brahman is beyond knowledge and ignorance, virtue and vice, merit and demerit, cleanliness and uncleanliness. (178)