Churning of ocean produced nectar and poison. Despite coming out of the same ocean, the goodness of nectar and harm of poison is not the same.
Poison ends the jewel-like life whereas nectar resuscitates or revives the dead making him immortal.
As the key and the lock are made of the same metal, but a lock results in bondage whereas a key frees the bonds.
Similarly a man does not give up his base wisdom but a person of Godly disposition never falters from the wisdom and teachings of the Guru. (162)