Faith consists in being vitally concerned with that ultimate reality to which I give the symbolical name of God. Whoever reflects earnestly on the meaning of life is on the verge of an act of faith. – Paul Tillich
Religion is the state of being grasped by an ultimate concern, a concern which qualifies all other concerns as preliminary and which itself contains the answer to the question of a meaning of our life. – Paul Tillich
Faith is an act of a finite being who is grasped by, and turned to, the infinite. – Paul Tillich
Loneliness expresses the pain of being alone and solitude expresses the glory of being alone. – Paul Tillich
An investigator starts research in a new field with faith, a foggy idea, and a few wild experiments. Eventually the interplay of negative and positive results guides the work. By the time the research is completed, he or she knows how it should have been started and conducted. – Donald Cram