At other times, Christ was compelled to defend Himself against the swarm of spies that hovered over His pathway through Samaria, along the Jordan, and around the Sea of Galilee. In His discussions with His enemies who sought to entrap Him, He displayed consummate skill in debate. His pithy sayings and incomparable illustrations usually left His questioners defenseless and chagrined. Oftentimes in these encounters He proclaimed eternal and universal truths which other nations and later ages were to develop and enjoy. When, holding in His hand a penny with Cæsar's image upon it, He said, "Render therefore unto Cæsar the things which are Cæsar's, and unto God the things that are God's," he foretold and stamped with approval the immortal principle that was to be embodied in the American constitution and to remain the cornerstone of the American Commonwealth; a truth repeated by Roger Williams when in the forests of Rhode Island he declared that the magistrate should rule in civil matters only and that man was answerable for his religious faith to God alone. This declaration of the Nazarene is the spiritual and intellectual basis of the sublime doctrine of civil liberty and religious freedom that finds its highest expression in that separation of the Church and State which enables men of different creeds and different parties to live side by side as patriots and religionists and as comrades, though antagonists. The replies of Jesus to those who came to "entangle him in his talk" usually left them disconcerted and defeated, and little disposed to renew their attacks upon Him.[277] The efforts of the Pharisees to entrap Him seem to have resulted in failure everywhere and at all times. And at the trial the Sanhedrin found itself in possession of a prisoner but with no competent evidence to establish His guilt. It was least of all prepared to convict Him of the crime of blasphemy as founded upon the claim of Messiahship, for Jesus had been exceedingly cautious, during His ministry, in declaring Himself to be the Messiah. Except in the presence of the woman of Samaria, who came to draw water from the well, there is no recorded instance of an avowal of His Messiahship outside the immediate circle of the disciples.[278] He forbade the devils whom He had cast out, and that recognized Him, to proclaim His Messiahship.[279] When the Jews said to Him, "How long dost thou make us doubt? if thou be the Christ, tell us plainly," Jesus simply referred them to His works, and made no further answer that could be used as testimony against Him.[280] He revealed Himself to His followers as the Messiah, and permitted them to confess Him as such, but forbade them to make the matter public. "Then charged he his disciples that they should tell no man that he was Jesus, the Christ."[281]