Leslie Stephen 
An Agnostic’s Apology and Other Essays (Barnes & Noble Digital Library) 

In addition to the title essay, this 1893 collection contains ‘The Scepticism of Believers, ‘ ‘Dreams and Realities, ‘ ‘What is Materialism?’, ‘Newman’s Theory of Belief, ‘ ‘Toleration, ‘ and ‘The Religion of All Sensible Men.’  Stephen asserts that theological matters are beyond the grasp of human reason, and so it is fruitless to speculate upon them.

About the author

Sir Leslie Stephen (1832-1904) was a British biographer, journalist, literary critic, and avid mountaineer. His works include The Playground of Europe (1871), Essays on Free Thinking and Plain Speaking (1873), The Utilitarians (1900), and biographies of Johnson, Pope, Swift, Eliot, and Hobbes. He was the father of Virginia Woolf and Vanessa Bell.