* **Was it not necessary** - This is a rhetorical question that means "It was necessary." (See: [[en:ta:vol1:translate:figs_rquestion]]) Jesus did right by suffering and would have done wrong by not suffering.
* **to enter into his glory** - This refers to the time Jesus will show everyone his beauty and greatness and receive honor and worship.
* **Jesus interpreted to them** - Use the dual form of "them."