Quietism grew from the mysticism of the great 16th century Spaniards, Teresa of Avila and Saint John of the Cross
Quietism states that man's highest perfection consists of a psychical self-annihilation and a subsequent absorption of the soul into the Divine Essence, even during the present life. So the mind is withdrawn from worldy interests to passively and constantly contemplate God.
Quietism has been contrasted to the Buddhist doctrine of Nirvana.Genesis
What quietism is