Fyodor Dostoyevsky
Publisher: Penguin Classics (2003)

In any case, what is suffering? I am not afraid of it, even though it be numberless. Now I am not afraid, though before I was. You know, I may not even answer at my trial...And it seems to me that there is so much of this strength in me now that I shall vanquish everything, all of the suffering, only so that I may keep saying to myself constantly: 'I am!' I may endure a thousand torments - yet I am, I may writhe under torture - but I am! I may sit in a tower, but I exist, I can see the sun, but even if I cannot see the sun, I know that it exists. And to know that the sun is there - that is already the whole of life.'