That's an interesting question. The only reasons why he didn't commit suicide that I can think of is the wisdom that follows the experiences of a daily human life. In order to comprehend different concepts in life, a lot of times people would put themselves into the situation itself and gain sense of sympathy and empathy as well as knowledge that will lead to "ultimate knowledge." To obtain "ultimate knowledge," there should be a mechanism for critical and abstract thinking, and those experiences our mind have with our bodies develope the gears to ignite the train of thought. As for Socrates, there probably isn't a joy in mortal life, but just monotonous questions that needs answers. If he truly believes that the mind will simply live forever,
