The Jewish People in Egypt were steeped in idol worship. The ultimate idol is man himself. Pharaoh declared himself a god. Hard work can bring a person to appreciation of G-d's beneficence. I did all this.
Hard work can bring a person to a sense of self-esteem.
Or it can fill him with self- importance. It can make us think we are the center of the universe. The New Moon too is a call to renew our relationship with G-d, lest we become trapped in spiritual stagnation. Yeshaya envisions the future time when all will unite to declare G-d's glory. Every week we have an opportunity to renew our connection.