“ He is a wise man whose pursuits are all without selfish plan or longings for results, and whose activities are purified by the fire of wisdom. ”
Source: Bhagavad Gita 4:19
He is full with contentment who absorbs all desires within, as the brimful ocean remains unmoved by waters entering into it
When a man completely relinquishes all desires of the mind and is entirely contented in the self, by the self, he is then considered to be settled in wisdom
Even if you are the chief sinner among all sinners, yet by the sole raft of wisdom you shall safely cross the sea of sin
As enkindled flame converts firewood into ashes, so does the fire of wisdom consume to ashes all karma.
For those who have conquered the mind, the mind is their friend. For those who have failed to do so, the mind acts like an enemy.