Jesuits in China adopted key Confucian terms to express Christian notions; for example, Tian 天 or Shangdi 上帝 was considered an equivalent for God, and guishen 鬼神 for angels. A Terms controversy started among the Jesuits and other missionaries and developed into the famous Rites Controversy. However, all the missionaries agreed in rejecting the Neo-Confucian concept of Taiji 太極, which was believed to be materialistic, pantheistic, or atheistic. The Flemish Jesuit François Noël, after a careful study of Neo-Confucian texts, interpreted (...) Taiji with the Western concept of nature, and even claimed that it held theistic meaning. We shall analyze and evaluate here this early Western attempt in giving a positive meaning to Taiji. (shrink)