I agree on the entire Gith/Githyanki/Githzerai/Illithid myth complex. That entire story is seriously cool, especially if you take Planescape sources and Planescape: Torment into it. The Unbroken Circle makes for an awesome read.
“YISUN was questioned once by their disciples at their speaking house. The questions were the following: ‘What is the ultimate reason for existence?’ To which YISUN replied, ‘Self-deception.’
‘How can a man live in perfect harmony?’ To which YISUN replied, ‘Non-existence.’
‘What is the ultimate result of all action?’ To which YISUN replied, ‘Futility.’
‘How best can we serve your will?’ To which YISUN replied, ‘Kindly ignore my first three answers.’