Answer: (this is the actual answer)
In his opening paragraph he expresses that he has new gained confidence in his abilities. He also expresses that feels he is qualified and meets the expectations of the constitution and declaration.
Explanation: (this is just the paragraph)
Proceeding, fellow citizens, to that qualification which the constitution requires, before my entrance on the charge again conferred upon me, it is my duty to express the deep sense I entertain of this new proof of confidence from my fellow citizens at large, and the zeal with which it inspires me, so to conduct myself as may best satisfy their just expectations.