Accordingly, it means that contributing to the industrial process with the black race helps the white race to gain profits from the union; it is never harmful to them. Furthermore, he uses different tones to express his ideas effectively. Most of his tone is humble to make his white audience feel comfortable and pleasant. The general impressions used in the speech are very kind and respectful. He doesn't even mention his race much so as not to offend white men. There is an alteration in his tone during the speech, which contains some defensive expression in the middle of the speech. However, he is generally respectful in not revealing his true purpose towards the black race. The speech does not appear to have any offense, although in some places it intimidates the white audience. He doesn't want to reveal that he poses a threat or that he wants the black race to make progress. This is why he expresses his opinions, in a non-superficial way, using humble tones, which is very wise to express ideas that must be considered unacceptable improvements for black people at the moment.