Spiritual hunger is a living, radiant fire put by God into hearts so that the ego can be burned; when it has been burned, this fire becomes the fire of longing, which never dies, either in this world or the next. There is no quicker way to God than spiritual hunger; if it travels through solid rock, water gushes forth. Spiritual hunger is essential for the Sufis; it is the showering of God's mercy on them.
"What makes one wise?" asked the disciple.
"Wisdom," replied the Master.
"What is wisdom?" was retorted.
"It is simply the ability to recognize," said the Master.
"To recognize what?" the disciple asked.
"Spiritual wisdom," the Master answered, "is the power to recognize the butterfly in a caterpillar, the eagle in an egg, the saint in the sinner."
"Only a silent mind is capable of this recognizing power."
~ Raimon Panikkar in THE RHYTHM OF BEING, THE UNBROKEN TRINITY