'Count' in the Bible

blessed is the one against whom the Lord will never count sin."

Why, what we now suffer I count as nothing in comparison with the glory which is soon to be manifested in us.

Not however that God's word has failed; for all who have sprung from Israel do not count as Israel,

In other words, it is not the children by natural descent who count as God's children, but the children made such by the promise are regarded as Abraham's posterity.