Paul Tillich was a Christian existentialist and philosopher popular in the 50s and 60s and one of the most influential theologians of the twentieth century. He was known for his book on popular theology The Courage to Be and The Dynamics of Faith and his multi-volume treatise of more academic theology, Systematic Theology. He worked by correlating human experience and alienation with Christian revelation. Many people, both academic and not, Christian and not, were attracted by his work, though his influence over contemporary theology has largely waned. (But hopefully it is making a resurgence! While it is imperfect, what I’ve read of it is good stuff!)
Among the moral types of faith, juristic faith involves obedience to a law, one that permeates all life; the law is felt as both a gift and a command, since life is satisfying within the strictures of the law. Tillich characterizes Islam and the Judaism of the Second Temple as juristic. Conventional faith remains poorly defined in Dynamics of Faith; he gives Confucianism as an example but explains no further. Presumably it involves the maintenance not of divine commands but of social expectations and thereby maintains societal order? Ethical faith demands obedience to justice as a way of reaching God; justice, I think, can be understand as something beyond adherence to rules but instead a commitment to principles which are not easily codified. The Hebrew Testament prophets are an example of this.*
But bear in mind that these forms are usually somewhat interconnected. Sacraments are generally marked out as separate not just in space but in behaviour: in order to approach the bearer of holiness, practitioners must observe ritual purity which resembles, or is, a juristic type of faith. The prophetic wisdom of ethical faith can often derive from mystical faith. And so on.
An issue that will keep coming up in this project is what I’m going to call investments. Tillich is invested in not just Protestant Christianity, but existentialist Protestant Christianity, and this comes through in his starting point (the ultimacy of the Ultimate) and his approach to faith (the human experience of the holy). It’s not just that, for Tillich, only Protestantism can put “Yes” in the column about self-criticism. Rather, Tillich’s desire to ask what a person’s ultimate concern is supposes that, indeed, a person might have only one concern, a view determined in advance by his monotheism, or his particular monotheism (“No one can serve two masters”). And Tillich’s sense of the sacramental bearer kept separate by ritual purity does not seem to make sense in religions which recognize all things as bearers of holiness (and I mean this in the sacramental sense, not just the sense of the goodness of Creation). His idea of what religion looks like comes from the anthropology that preceded him, and that anthropology was … well, it was the 30s, 40s, and 50s.
**In this chart I’m trying to replicate Tillich’s representations, not supply my own. Feel free to quarrel with his interpretations.