Listen to the words of Psalm 135:1-7:
Praise the LORD!
Praise the name of the LORD,
give praise, O servants of the LORD,
2 who stand in the house of the LORD,
in the courts of the house of our God!
3 Praise the LORD, for the LORD is good;
sing to his name, for it is pleasant!
4 For the LORD has chosen Jacob for himself,
Israel as his own possession.
5 For I know that the LORD is great,
and that our Lord is above all gods.
6 Whatever the LORD pleases, he does,
in heaven and on earth,
in the seas and all deeps.
7 He it is who makes the clouds rise at the end of the earth,
who makes lightnings for the rain
and brings forth the wind from his storehouses.
If verse 3 is true, that God is truly good, then verse 6 should bring us great comfort and joy. The fact that God is good makes the fact that He does whatever He pleases good news. Most times, if we say that someone just does whatever they please, it is viewed as a bad thing. This is because we, according to Scripture, are anything but good. Even our best deeds are worthless trash, to put it nicely (Isaiah 64:6), so doing whatever we please is not likely to turn out well for anyone. But we cannot view God this way.
He is Good.
The essence of His being is only good. There is no darkness, no evil, in Him. No part of Him is anything but absolutely good. So, when God does what He pleases, He only does good. And this is good news, for the good that God does is of great benefit to those who trust in Christ. Romans 8:28:
And we know that for those who love God all things work together for good, for those who are called according to his purpose.
What God pleases is good, and what He does is good. And all this good is for the benefit of those whom He calls His children. This is good news.