Below is an excerpt from, "The Soul of Kierkegaard: Selections from His Journals." Edited by Alexander Dru. Dover Publications, Inc: Mineola, New York. 2003. Pg. 184.
Socrates did not first of all get together some proofs of the immortality of the soul in order then to live in that belief, on the strength of the proofs. The very reverse is the case; he said: the possibility of there being an immortality occupies me to such a degree that I unquestionably stake my whole life upon it as though it were the most certain of all things. And so he lived---and his life is a proof of the immortality of the soul. He did not believe merely on the strength of the proofs and then live: no, his life is the proof, and only with his martyr's death is the proof complete.---That, you see, is spirit; it is a little awkward for those who repeat him and for all those who live second-hand, or tenth-hand lives, and those who chase after results, and for cowardly, effeminate natures.