Describe Dimmesdale?

From the text,

The directness of this appeal drew the eyes of the whole crowd upon the Reverend Mr. Dimmesdale; a young clergyman, who had come from one of the great English universities, bringing all the learning of the age into our wild forest-land. His eloquence and religious fervor had already given the earnest of high eminence in his profession. He was a person of very striking aspect, with a white, lofty, and impending brow, large, brown, melancholy eyes, and a mouth which, unless when he forcibly compressed it, was apt to be tremulous, expressing both nervous sensibility and a vast power of self-restraint. Notwithstanding his high native gifts and scholar-like attainments, there was an air about this young minister,—an apprehensive, a startled, a half-frightened look,—as of a being who felt himself quite astray and at a loss in the pathway of human existence, and could only be at ease in some seclusion of his own. Chapter 3