“You have spoken much today of my self-sacrifice and devotion to my country. I have heard that kind of speech ever since I came out of jail, but I hear it with embarrassment, with something of pain. For I know my weakness, I am a prey to my own faults and backslidings. I was not blind to them before and when they all rose up against me in seclusion, I felt them utterly. I knew them that I the man was a man of weakness, a faulty and imperfect instrument, strong only when a higher strength entered into me. Then I found myself among these young men and in many of them I discovered a mighty courage, a power of self-effacement in comparison with which I was simply nothing. I saw one or two who were not only superior to me in force and character, - very many were that, — but in the promise of that intellectual ability on which I prided myself.”

Sec. 314
The Gay Science (1882)

O meu problema, nesta situação, é saber se já deveria ter corado antes, ou se é agora que devo corar, Lembro-me de a ter visto corar uma vez, Quando, Quando toquei na rosa que estava no seu gabinete, As mulheres coram mais que os homens, somos o sexo frágil, Ambos os sexos são frágeis, eu também corei, Sabe assim tanto da fragilidade dos sexos, Sei da minha própria fragilidade, e alguma coisa da dos outros.
Source: The History of the Siege of Lisbon (1989), p. 219

Interview with Sir David Frost on the BBC, 1972.
Quote, Other

The Calmative (1946)

Source: Medea and Other Plays: Medea / Alcestis / The Children of Heracles / Hippolytus

Part VII, "The Anathēmata" (p. 801)
Dhalgren (1975)

As quoted in "Christopher Isherwood Interview" with Winston Leyland (1973), from Conversations with Christopher Isherwood, ed. James J. Berg and Chris Freeman (2001), p. 108

Too Busy Not to Pray (2008, InterVarsity Press)

My Life and Confessions, for Philippine, 1786