Jnani/vijnani
The difference between a jnani and a vijnani is the small matter of a leap of faith. The janani has knowledge of God, but will not believe in his knowledge.
A jnani is like one who knows beyond doubt that a log of wood contains fire. But a vijnani is he who lights the log, cooks over the fire, and is nourished by the food.
A jnani will not talk about spiritual things without being asked. He will enquire, at first, about such things as your health and your family. The vijnani is different. He is unconcerned about anything.
The jnani says "This world is a framework of illusion." But he who is beyond both knowledge and ignorance describes it as "a mansion of mirth".