A friend of mine just defended his Ph.D successfully (congratulations, Nabil !), and sent me this excerpt (extracted from here) in response to my email congratulating him:
In February 1995, on a beautiful sunny day with clear Carolina blue skies, I turned in the final,signed copy of my dissertation. The graduate school staff member did some last-minute checks on the document and pronounced it acceptable. After six and a half years of toil and sweat, I was finally done! While walking back to the C.S. department building, I was sorely disappointed that the heavens didn't part, with trumpet-playing angels descending to announce this monumental occasion. Upon hearing this observation, Dr. Fred Brooks (one of my committee members) commented, 'And the sad fact is, you're no smarter today than you were yesterday.'"
Another amusing take on graduate student life, from the same article:
Being a graduate student is like becoming all of the Seven Dwarves. In the beginning you're Dopey and Bashful. In the middle, you are usually sick (Sneezy), tired (Sleepy), and irritable (Grumpy). But at the end, they call you Doc, and then you're Happy.