There is a typo - it should be 'rede de relações'. The first sentence could be translated as 'a human being is nothing more than a network of relationships'. It means that, as human beings, we are defined by our relationships with other humans. It is these relationships that make us human.

Hi, Yeji! Su.ki answered very well! But I'd like to complement her comment with an information. In portuguese, "networking" is frequently used in business language, there are the people that you know and that can introduce you to someone or something to help you profissionally. We don't translate "networking", this word is used in english.

A palavra relaões deve ser relações