That is something that must always be considered when examining the life and teachings of Jesus. We have many decades of works from others such as the Buddha, Confucius, Mencious, Mo Tzu, Lao Zi and Haung-Po but Jesus taught for only three years and very, very little of his actual works have been preserved. The little we do have of Jesus teachings has a remarkable resemblance to the teaching of the eastern sages. So much of his teachings deal with behavior and relationships, the very same issues dealt with by the Buddha and the others.
Aslan is not a Tame Lion