The True Meaning of the Lord of Heaven (Tianzhu Shiyi 天主實義) is a Chinese text of the 17th century written by the Italian sinologist and missionary Matteo Ricci. It contains, among other topics, a discussion between a Confucian scholar and a Christian about the motivation to act. For Confucianism a good action should be performed for its own sake, without any thought of future reward. For Christianity it seems that good actions are performed in order to go to Heaven. Ricci argues that human actions are complex. The ultimate motivation for goodness comes from a relation with God. The Confucian scholar claims that actually not all actions need a motive. Sometimes things “just happen.” Also, a good tradition can move people to behave properly. Dealing with topics such as soul, eternal life, causes, descendants, tradition, happiness and proper behavior, this dialogue offers a great insight of the meeting of two great traditions: Confucianism and Christianity.