Charles H. Spurgeon on Psalms 2:6

"Zion." The name "Zion" signifies a "distant view" (speculam). And the church is called "a distant view" (specula), not only because it views God and heavenly things by faith (that is, afar off), being wise unto the things that are above, not unto those that are of the earth; but also, because there are within her true viewers, or seers, and watchmen in the spirit, whose office is to take charge of the people under them, and to watch against the snares of enemies and sins; and such are called in the Greek bishops (episkopoi), that is, spyers or seers; and you may for the same reason give them, from the Hebrew, the appellation of Zionists or Zioners. Martin Luther.