The function of a Dharma protector is to arrange all outer and inner conditions so that everything that happens to us is perfect for our swiftest possible enlightenment. But Dorje Shugden is more than just a Dharma protector, he is also a wisdom Buddha.

It is not enough to just know that the outer and inner conditions of our lives are perfect for enlightenment, but to be able to take full advantage of these conditions we need to understand and realize directly how (or in what way) they are indeed perfect.

When we have the wisdom which realizes how our conditions are perfect, then we can fully take advantage of them and move most swiftly towards enlightenment. The blessings of Dorje Shugden bestows upon us this wisdom of realizing how the conditions he has emanated for us are in fact perfect. Then, we are not only happy with everything but can use everything most effectively to advance along the path.

When we realize the emptiness of inherent existence, then we realize that Dorje Shugden’s power is not limited to just arranging perfect conditions for ourselves and bestowing upon ourselves the wisdom to realize how our conditions are perfect, but we can also invoke him to accomplish the same blessings for each and every living being.

We pray to him so that he can arrange all outer and inner conditions for each and every being so that whatever happens to them will be perfect for their attainment of enlightenment. He can then bestow upon us the wisdom that sees directly how whatever arises is in fact perfect for the attainment of enlightenment. Then, we can share the wisdom we have acquired with others, helping them towards the bliss of full enlightenment.

From our perspective, Dorje Shugden is the same being as the wisdom Buddha Manjushri. Manjushri appears in two aspects, as Je Tsongkhapa to lead us along the path and as Dorje Shugden to arrange all the suitable conditions for our practice. It is therefore impossible to reject one without rejecting the other two.

Since we agree that Manjushri and Je Tsongkhapa are perfectly reliable Buddhas and Dorje Shugden is for us just a different aspect of the same being so Dorje Shugden is also perfectly reliable. We cannot reject him without rejecting the others. Since we cannot reject the others, we cannot reject him.

Source : http://kadampaworkingdad.wordpress.com/2012/02/06/wisdom-buddha-dorje-shugdens-two-functions/