SIAM DOCTOR (255 pp.)Jacques M. MayDoubleday ($2.75).
Taoist Philosopher Lao-tse told the parable to his disciples:
"A man had a horse which ran away. When the neighbors came to express their sympathy the man said: 'Who knows what is good luck and what is bad luck?'
"A few days later his horse returned, bringing a herd of wild horses back with him. The neighbors came to congratulate him, and the wise man said: 'Who knows what is bad luck or good luck?'
"A few days later his son, seeing so many horses, took to riding and...