Yearning is inseparable from love, and since once doesn't have the object of love immediately, one has not fallen in the embrace of the beloved immediately, they are suffering. That's how they are related.

The human soul, provided it is pure and strong enough, can contact the unseen in waking life as well as in dreams: all that is required is withdrawal of the soul from the tumult of sensory life.

Look at Senegal, about 90% of the Muslims in Senegal are Tijani or Qadiri Sufis. Among them, they have very great teachers who have written poems about al-Hallaj, and they have not been killed. In fact, it's Sufism that brought Islam through all of Senegal, right under our noses the last couple of centuries. And you can go down the same line through Indonesia and Malaysia.

Militarily, the great movements of resistance against colonial powers in the 18th and 19th century were almost all from Sufis: Imam Shamil in Caucasia, Amir Abd al Qadir in Algeria, The Barelvi family in the modern province of India, today which is Pakistan, and you can go down the line.

The life of Islamic philosophy did not terminate with Ibn Rushd nearly eight hundred years ago, as thought by Western scholarship for several centuries. Rather, its activities continued strongly during the later centuries, particularly in Persia and other eastern lands of Islam, and it was revived in Egypt during the last century.

What does a lamp do? The lamp is like a horse that is running but stays put. But by virtue of being a lamp it illuminates the space around it. Therefore, the practice of purifying one's soul, of living virtuously, has tremendous impacts upon the ethics of the surrounding society.

The Quran mentions the story of Moses and Khidr [a prophet mentioned in the Quran who guided Moses on a revelatory journey], a famous story, in which Moses represents sort of the external understanding of the religion and Khidr represents the inner spiritual understanding of the religion. Moses went on a journey with Khidr and Khidr said, "I will not accept you unless you stop questioning things," which from an external point of view seems strange, but inwardly is very meaningful. This is exactly the question of spiritual guidance.