Buddhist teacher Pema Chodron writes in When Things Fall Apart: Heart Advice for Difficult Times (2005):

The difference between theism and nontheism is not whether one does not believe in God… Theism is a deep seated conviction that there’s some hand to hold… Nontheism is relaxing in with the ambiguity and uncertainty of the present moment without reaching for anything to protect ourselves… Nontheism is finally recognizing that there is no baby sitter you can count on.