Be humble, boast no more

Psalm 75:1-10
The Lord says "I choose the appointed time; it is I who judge uprightly."
To the arrogant "Boast not more", to the wicked "Do not lift your horns", Do not lift your horns against heaven; do not speak against with outstretch neck.
It is God who judges; He brings one down, he exalts another.
The Lord will cut off the horns of all the wicked but the horns of the righteous will be lifted up.
Be humble and praise the Lord, I give thanks to God and sing praise to the God, declare his name forever.
Why?
The position higher or lower depends on the Lord under the similar situation. God judges all.
The Lord will cut off the horns of all wicked, but the time is in the hands of God.
The end is confirmed, we have to wait, for the Lord has said all of this, He give the wicked chance to repent for their sins. Everyone who boasted will falls.
How?
I should to do is give thanks to the Lord for every thing. I will tell the wonderful deeds of the Lord.
Humble myself for all of I have is come from the mercy of the Lord.