Jesus’ teaching was open and public. The miracles He worked were not hidden; the people and leaders saw them. Jesus testified to them, "I have spoken openly to the world...taught in the synagogues and in the temple." He was saying that His teaching was not a secret. They did not have to ask Christ. They could have asked anyone who had been around and heard His teaching.
The teaching of Jesus is not secret today. It is given to the world in the scriptures of the Old and New Testaments. We proclaim it and give it to the world freely.