That they also may be in us (hina kai autoi en hēmin ōsin). Another purpose clause with hina and the present active subjunctive of eimi. The only possible way to have unity among believers is for all of them to find unity first with God in Christ.
That the world may believe (hina ho kosmos pisteuēi). Another purpose clause with hina and the present active subjunctive of pisteuō, “may keep on believing.” Beyond a doubt, strife, wrangling, division are a stumbling block to the outside world.