Luke 22:67-69

 "'If You are the Christ, tell us.' But He said to them, 'If I tell you, you will by no means believe.'"

 "'And if I also ask you, you will by no means answer Me or let Me go.'"

 "'Hereafter the Son of Man will sit on the right hand of the power of God.'"

 (Some people absolutely will not believe. Miracles would not convince them, for many are far too hard-hearted to listen to anything.)