en_tn_condensed/jas/01/18.md

to give us

The word "us" refers to James and his audience.

give us birth

God, who brought us eternal life, is spoken of as if he had given us birth.

the word of truth

Possible meanings are 1) "the message about the truth" or 2) "the true message."

so that we would be a kind of firstfruits

"so that we would be like an offering of firstfruits"