In his essay 'The Myth of Sisyphus', Albert Camus considers suicide, the "one truly serious philosophical problem", and asks, "is there a logic to the point of death?" Then he gives us this paragraph:
When Karl Jaspers, revealing the impossibility of constituting the world as a unity, exclaims: “This limitation leads me to myself, where I can no longer withdraw behind an objective point of view that I am merely representing, where neither I myself nor the existence of others can any longer become an object for me,” he is evoking after many others those waterless deserts where thought reaches its confines. After many others, yes indeed, but how eager they were to get out of them! At that last crossroad where thought hesitates, many men have arrived and even some of the humblest. They then abdicated what was most precious to them, their life. Others, princes of the mind, abdicated likewise, but they initiated the suicide of their thought in its purest revolt. The real effort is to stay there, rather, in so far as that is possible, and to examine closely the odd vegetation of those distant regions. Tenacity and acumen are privileged spectators of this inhuman show in which absurdity, hope, and death carry on their dialogue. The mind can then analyze the figures of that elementary yet subtle dance before illustrating them and reliving them itself.
(English translation by Justin O'Brien, 1955.) What did Camus mean by the sentences in bold?