Often times it is the result of the sublime presence within the landscape, the picaresque and the unfathonable awe that it inspires within that engenders these afflictions which act in creating overwhelming feelings that overcome the poet with a contemplative rapture that is both enchanting and transporting.
Nature is the revelation of truths normally unseen by the eye.
Nature unspeaks truths an in doing so introduces 'gleams of a remoter world'and becomes an enlightened promise. But the awe that is inspired arises from a sense of terror, or rather fear at the overwhelming presence of the mountain.