Christianity balances a theology of immanence with that of transcendence, with different periods of Christianity and different denominations leaning more to one or the other pole. Within the Trinity, God can be considered transcendent, the Holy Ghost immanent, and Jesus as a combination of both (being of two natures).
Transcendence is important because it represents ideals beyond this world, and links us to the eternal and the spiritual. It teaches us not to place value on material things such as wealth and possessions but to consider morals and ideals important.
Immanence is important because we live and act in the world and in so far as we see God as immanent in the world and the beings inhabiting the world, we act more responsibly towards the environment and other living beings.