Although Moses believes in Yahweh, he does not trust in him. This is because Moses lacks understanding. Moses tries to believe the things he is asked to do are done by his own power. Yahweh is trying to get Moses to trust that these are Yahweh's doing. (See: [[rc://en/tw/dict/bible/kt/believe]] and [[rc://en/tw/dict/bible/kt/trust]])
This chapter really introduces the concept that the people group Israel is the chosen people of God and God's children, possibly God's firstborn children. (See: [[rc://en/tw/dict/bible/kt/elect]] and [[rc://en/tw/dict/bible/kt/peopleofgod]] and [[rc://en/tw/dict/bible/other/firstborn]])
Scholars are divided over how to understand this statement. There is debate over whether Pharaoh plays an active or passive role in the hardening of his own heart. (See: [[rc://en/ta/man/translate/figs-activepassive]])