'Save' in the Bible

For since, in the wisdom of God, the world through its wisdom did not know God, God was pleased through the foolishness of preaching to save those who believe.

For how do you know, wife, whether you will save your husband? Or how do you know, husband, whether you will save your wife?

To the weak I became weak, in order that I may gain the weak. I have become all [things] to all [people], in order that by all means I may save some.