"Only hire people who are better than you. Do not compromise. Ever."
"A bad hire is toxic, not only destroying their own performance, but dragging down the performance, morale, and energy of those around them."
"G.P.A.s are worthless as a criteria for hiring, and test scores are worthless. After two or three years, your ability to perform at Google is completely unrelated to how you performed in school."
These quotes are from Bock's book "Work Rules!" and his 2013 New York Times interview.