Bereshis

THE MAN CALLED HIS WIFE'S NAME CHAVA FOR SHE WAS THE MOTHER OF ALL LIVING (Bereshis 3:20).

Why did he call her the "mother of all living" after she brought death into the world?*

Individuals die but mankind lives through Woman.  He could have railed at his wife; instead he calls her by the loveliest calling.  Both man and woman were cursed with affliction, but her affliction is for a high purpose- the dispenser of life (Rav SR Hirsch).

*This is unlike Rashi who explains this event as happening before Adam and Chava sinned.

AND FROM THE TREE OF KNOWLEDGE OF GOOD AND BAD DO NOT EAT, FOR ON THE DAY YOU EAT FROM IT YOU WILL SURELY DIE (2:17).

What is wrong with knowledge of good and bad?

According to commentators this is not True Knoweldge but a lower form of knowledge that is not necessary. Adam already possessed great intelligence.  He was made in G-d's image (1:26) and named the animals (2:19).

 Sforno says says "good and bad" refers to subjective good and bad i.e. sweet and bitter.This is course may contradict objective truth.  Since he ate from the tree humanity has been often misled by subjective impressions.

Ramban, based on Scriptural and Rabbinic sources, explains "knowledge" (Daas) to mean will.  By eating from the tree he incoporporated conflicting wills (good and bad) into himself.  Humanity has been conflicted ever since.