Jim will not push a heavy box. he says "my force will produce an opposite force and cancel my effort." evaluate jims statement

This statement is based on Newton's third law. For every action there's an equal and opposite reaction. That means that when he pushes, the box will apply the force back at him. It won't cancel his effort completely if he applies enough force because other forces around him and the box also apply so the box will eventually move with enough force.