what is significant about how father maple climbs into the pulpit to address his congregation

He entered the church and approached the pulpit like a seaman. He was ONE of his congregation.

"When he entered I observed that he carried no umbrella, and certainly had not come in his carriage, for his tarpaulin hat ran down with melting sleet, and his great pilot cloth jacket seemed almost to drag him to the floor with the weight of the water it had absorbed. However, hat and coat and overshoes were one by one removed, and hung up in a little space in an adjacent corner; when, arrayed in a decent suit, he quietly approached the pulpit."