And there they are unto this day - This proves that the book was written before the destruction of the first temple, but how long before we cannot tell.

drew out the staves

Exodus 25:14,15 And you shall put the staves into the rings by the sides of the ark, that the ark may be borne with them...

Exodus 37:4,5 And he made staves of shittim wood, and overlaid them with gold...

Exodus 40:20 And he took and put the testimony into the ark, and set the staves on the ark, and put the mercy seat above on the ark:

ends [heb] heads
holy place. or, ark, as

2 Chronicles 5:9 And they drew out the staves of the ark, that the ends of the staves were seen from the ark before the oracle...

unto this day

Joshua 4:9 And Joshua set up twelve stones in the middle of Jordan...

Matthew 28:15 So they took the money, and did as they were taught: and this saying is commonly reported among the Jews until this day.

The Next Words Are, which Art in Heaven. ...
The next words are, WHICH ART IN HEAVEN. From this we are not to infer that he is enclosed and confined within the circumference of heaven, as by a kind of boundaries. Hence Solomon confesses, "The heaven of heavens cannot contain thee" (1 Kings 8:27); and he himself says by the Prophet, "The heaven is my throne, and the earth is my footstool" (Isa. 56:1); thereby intimating, that his presence, not confined to any region, is diffused over all space. But as our gross minds are unable to conceive of …
John Calvin—Of Prayer--A Perpetual Exercise of Faith

The Whole Heart
LET me give the principal passages in which the words "the whole heart," "all the heart," are used. A careful study of them will show how wholehearted love and service is what God has always asked, because He can, in the very nature of things, ask nothing less. The prayerful and believing acceptance of the words will waken the assurance that such wholehearted love and service is exactly the blessing the New Covenant was meant to make possible. That assurance will prepare us for turning to the Omnipotence …
Andrew Murray—The Two Covenants

The Gospel of John
As we turn to the fourth Gospel we come to entirely different ground from that which we have traversed in the other three. True, the period of time which is covered by it, is the same as in the others; true, that some of the incidents that have already been looked at will here come before us again; and true it is that he who has occupied the central position in the narratives of the first three Evangelists, is the same One that is made preeminent by John; but otherwise, everything here is entirely …
Arthur W. Pink—Why Four Gospels?