Timber & the 3 Angel's Message Mission

Even to prepare me timber in abundance:

for the house which I am about to build

shall be wonderful great.

2 Chronicles 2:9

What is "timber" (trees) a symbol for?
Blessed is the man that walketh not in the counsel of the ungodly,

nor standeth in the way of sinners, nor sitteth in the seat of the scornful. 
But his delight is in the law of the LORD; and in his law doth he meditate day and night.
And he shall be like a tree planted by the rivers of water, that bringeth forth his fruit in his season; his leaf also shall not wither; and whatsoever he doeth shall prosper.
Psalm 1:1-3

For the "house" of God, prepare TIMBER IN ABUNDANCE. ... This is the mission of the 3 Angel's Message for the world...preparing the TIMBER in ABUNDANCE.

And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people,..
Revelation 14:6