In thinking be mature
By: Paul Tillich
Published: 1958
Language: eng
Work titles: Eternal now
Notes: Unpublished typed copy of a sermon delivered in the Washington Cathedral as part of the annual Convention of the American Association of the Advancement of Science.

First published in The Washington Diocese, v. 28, no. 2 (February 1959); later published as chapter 14 of The eternal now / Paul Tillich. New York : Scribners, 1963.