You would be absolutely correct.
Israel was repeatedly smacked down in the OT for saying "look what WE did" rather than "look at what GOD has done for us." This was especially plain in the minor prophets, when God let Israel do their own thing (and be conquered by multiple enemies as a result) when they refused to acknowledge him. Israel's pride first split the nation into northern and southern kingdoms, and then eventually brought the fall of both of them.
Isaiah equated our "accomplishments" to "filthy rags" (Isaiah 64:6).
Jesus declared "whoever humbles himself like a child is the greatest in the Kingdom of God" (Mt 18:4) and "whoever exalts himself will be humbled, and whoever humbles himself will be exalted" (Mt 23:12; Luke 14:11, 18:14).
Paul wrote, "Let him who boasts, boast in the LORD" (1 Cor 1:31; 2 Cor 10:17) and "[F]ar be it from me to boast except in the cross our Lord Jesus Christ…" (Galatians 6:14). Also, the aforementioned first half of Romans in which Paul systematically dismantles the Jews' pride in being "of Abraham" and "of the Law". Jesus repeatedly called out the Pharisees' pride in being "of Abraham" to show that being "of Abraham" wasn't the point and would ultimately become meaningless.
When his disciples told him how proud they were of their temple, Jesus told them there wouldn't be "one stone left upon another" when the Romans were done (Mt 24:2; Mk 13:2; Lk 21:6)—a statement that eventually became true when their prized temple was destroyed in AD 70 and the sacrificial system they had so much pride in was abolished in its entirety; Israel has not had either since.
The Bible as a whole declares that it is nothing about you and everything about HIM. The covenant with Abraham (Genesis 15) was completely one-sided (only God walked through the split animals when both of them should have; the idea was that "may I become like these slaughtered animals and my blood be shed if I break this agreement"); Abraham broke it almost immediately by lying about his wife being his sister but not also his wife to save his own skin (Genesis 201). The covenant with Moses (Exodus 19) is likewise one-sided. God makes the covenant with Israel knowing Israel was incapable of keeping its side of the bargain thus it is one-sided by definition. The final covenant through Jesus' crucifixion is also one-sided—God's judgment for breaking the covenant demands my destruction; instead he puts his own son in my place and then puts an exclamation point on it by resurrecting him once his justice was fully satisfied and there was no reason for his son to stay dead.
The Bible makes no distinction in either its original language or in its themes between "pride" and "hubris"; they are treated identically and the text concludes that only one form is acceptable—based on God's sovereign work, and any pride in identity is based on God's prerogative and not ours.
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Technically, from the text we find that Sarah was indeed a sister of Abraham's in that they share the same father but not the same mother (Genesis 20:12). There was no divine ban against marrying within a family until Moses and the Exodus; at the time of Abraham it was likely accepted because there were few other options, if any. ↩