Even though the author uses the plural pronoun "we," he is most likely referring only to himself. AT: "I greatly desire" (See: [[rc://en/ta/man/translate/figs-pronouns]])
"in order to have complete certainty that you will receive what God has promised you"
# imitators
An "imitator" is someone who copies the behavior of someone else.
# inherit the promises
Receiving what God has promised believers is spoken of as if it were inheriting property and wealth from a family member. AT: "receive what God promised them" (See: [[rc://en/ta/man/translate/figs-metaphor]])