When Jacob and Esau met, Esau kissed Jacob – at first not wholeheartedly, but then with sincere, albeit fleeting, wholeheartedness.
Genesis 33:4
Jacob not only survived his meeting with Esau but transformed him. Whereas Esau had previously wanted to kill Jacob, he now ran toward him to hug and kiss him. This (albeit temporary) reconciliation between Jacob and Esau was a monumental spiritual event, which laid the foundation upon which the work of permanently transforming the materiality that Esau represented could take place over the course of history.
Esau’s two successive sentiments while kissing Jacob correspond to the two successive methods by which we refine the animating soul and the world in general. The first stage, in which Esau goes through the motions of kissing Jacob but his heart is not in it, alludes to how at first, the crudeness of the material world remains but we subdue it, forcing it to behave in a G-dly way. In the second stage, in which Esau kisses Jacob wholeheartedly, alludes to how we then transform the materiality of nature, refining it to the point that nature itself becomes holy.
--Daily Wisdom Vol. 3