John 2:23-25

Remember the eagle again (the great eyesight)—that he can view things from afar? Well here we see Jesus with insight into the hearts of men. He knew men. What did He know in this situation? He would not commit Himself to those who profess belief on the basis only of His miracles (the signs) because it is superficial. He says an evil and adulterous generation seeks after a sign.

He told them later, "You're only following me because you ate, because I supplied you with food." That's not what Christ is looking for. He's looking for people of faith; people who believe Him because of His word—what He says, what comes out of His heart.

John 2:23-25

Of course our Creator has a perfect insight into His creation, and He could see even as a man what people were thinking, how people would react, what their emotional state was, what their motivations were, and He used that throughout His ministry so that He could respond properly because He knew what would come back to Him when He spoke.