The early church had an immeasurable effect far and wide. It shook whole worlds; it established a completely different and undreamed-of new world. But the Spirit burning with love is more delicate than the hard edifices of calculating reason and its coldly organizing social structure; more delicate also than the powers of the soul and the blood, which so many extended families and national communities try to use as a foundation. Because the Holy Spirit is supremely noble and supremely divine, he is more sensitive than all other forms of life when he is confronted with anything coarse or gross. Free from all connection with other elements, he drives them all away, or he withdraws before they can offend him.

What was the all-important event that took place in Jerusalem at Pentecost?