Complex sentence: Foolishness for Christ refers to behavior such as giving up all one's worldly possessions upon joining a monastic order, or to deliberate flouting of society's conventions to serve a religious purpose--particularly of Christianity.
Split into simpler sentences: Foolishness for Christ refers to behavior such as giving up all one's worldly possessions upon joining a monastic order. It can also refer to deliberate flouting of society's conventions to serve a religious purpose--particularly of Christianity.