“Christian spirituality is a spirituality of hope. St. Paul believes that Christians are those who have hope (1Thess 4:13). Now to hope is to look forward to the new, to what is not yet there, and strive to bring it about. Hence hope is forward-looking and forward moving. That is why a spirituality of hope is a spirituality of change. According to Karl Rahner it is a sin against hope to refuse to change. Those who refuse to change regard the past or the present as the final state of humankind. We are not yet in the new heavens and the new earth. We are on our way to them. And so our spirituality is a spirituality of hope and change.”

Jesus, as portrayed in Preface, Difference Between Reader And Spectator
1930s, On the Rocks (1933)
Context: The kingdom of God is striving to come. The empire that looks back in terror shall give way to the kingdom that looks forward with hope. Terror drives men mad: hope and faith give them divine wisdom. The men whom you fill with fear will stick at no evil and perish in their sin: the men whom I fill with faith shall inherit the earth. I say to you Cast out fear. Speak no more vain things to me about the greatness of Rome. … You, standing for Rome, are the universal coward: I, standing for the kingdom of God, have braved everything, lost everything, and won an eternal crown.

Source: Always True (Moody, 2011), p. 89

A version of his staple "Hope Speech," quoted in Randy Shilts, The Mayor of Castro Street: The Life and Times of Harvey Milk (1982), p. 363

62
The Zürau Aphorisms (1917 - 1918)

Source: Intertwined

Source: The Western Lands (1987), ch. 5, as cited in The Columbia Dictionary of Quotations (1993), pg. 234

Source: The Son of Neptune

1830s, The American Scholar http://www.emersoncentral.com/amscholar.htm (1837)