I am trying to understand a sentence from Nernst's Nobel Lecture in Chemistry. He was a German however, his lecture is in English. It is a very nice introduction however the last part is difficult for me as a non-native English user. The quote is as follows "But the fact that a prize is awarded to an individual who, as a child of his time and equipped with the logical and experimental methods of his time, is really only able, by climbing on the shoulders of his predecessors, perhaps to see a little further in some direction than anybody else before him - does not this fact lead to such strong individualization that his personality must obtrude more than usual into his grateful reply?"
What does the part in italics (my own) mean? The part which confuses me is the meaning of "...personality must obtrude more than usual into his grateful reply?"