That was the first thing I wondered when I realized that he was n't joking . " He gazed at Goku again . " I suppose I 'll level with you ; we all know that Sanzo has not been himself lately . "

Question: Why would he gaze at Goku ?
Answer: Because he wants to trick Goku .Because he wants to talk to Goku .Because he wants to fight Goku .Because he wants to ruin Goku .