I would have to say some of the Psalms were written in complaint but a lot of them were written in looking at the Savior or even lifting up the Word of God. 

Most of the Psalms were written by David. David was the king of Israel and he wrote about a lot of experiences that happened in his life. We will look at these more In detail but I want you today If you will find some time and ask the Lord to give you help or encouragement while we walk through this book of the Bible. 

Some Psalms "songs" were written for when they went to the temple each year and for every step they stopped and sang the psalm. These are called Psalm of degrees. 

Then he closes out the book with how important it is to praise the Lord. I am looking forward to looking deeper into the book of Psalms and hope you will be looking forward to it as well.