The Greek verb metreo means to measure, to estimate, or to apportion by measure. It is used literally of measuring space (Revelation's temple measurements) and metaphorically of the standard by which one is judged. The principle 'with the measure you use, it will be measured to you' (Matthew 7:2) establishes metreo as a law of reciprocal judgment.
Metreo is the verb of divine justice and reciprocity. The Golden Rule has a measuring dimension: what standard you apply to others, God applies to you. This is not karma but the divine law of covenant justice — God takes our own stated standards seriously. Revelation's measuring of the temple (11:1–2) and the New Jerusalem (21:15–17) signifies divine evaluation and ownership. To measure something is to claim it, to assess it, to establish its worth.