《三国志·魏书·荀彧攸贾诩传》
荀攸思虑深远有智谋，又能保守机密，自从跟随太祖四处征讨，常常运筹帷幄，当时的人和各子弟都没有人能知道他的意思。
攸深密有智防，自从太祖征伐，常谋谟帷幄，时人及子弟莫知其所言。
Xun You was a person of deep thought and considerable intellect, who was also good at guarding military secrets. After he began to follow the Grand Ancestor to make military expeditions, he was often the one to make the tactical decisions. The people of his time and even his own descendants were unable to fathom what he was thinking.