Tao Zhengren wouldn't teach Gao Xuan the martial arts of Wudang. However, when Gao Xuan actively inquired about the essence, he didn't refuse. Because these were things Gao Xuan learned on his own and had nothing to do with him.
Helping Gao Xuan interpret the essence was something he did in passing.
Of course, this actually violated the sect's rules. But since Gao Xuan had saved Tao Zhengren's family twice, he had to make some concessions in such matters.
Tao Zhengren didn't know that Gao Xuan wasn't from this world, and his understanding of this world's language was always a bit lacking.
Though Tao Zhengren's explanations of the essence weren't too significant, they allowed Gao Xuan to truly understand the real meaning conveyed by the Golden Silk Palm and the Pure Yang Wuji. He comprehended the essence of inner strength.
