Glendower: I can call spirits from the vasty deep.
Hotspur: Why, so can I, or so can any man;
But will they come when you do call for them ?
For all the enormous achievements of science in posting the universe that man inhabits, odd things keep slipping past the sentries. The tap on the shoulder may be fleeting, the brush across the cheek gone sooner than it is felt, but the momentary effect is unmistakable: an unwilling suspension of belief in the rational. An old friend suddenly remembered, and as suddenly the telephone rings...