Songs/Stories for God

The book of Psalms is pretty interesting. They are supposedly sacred songs and/or hymns, but to me, they seem more like short parts of the stories from the Bible.

I, myself, have read four of them. They're all a bit confusing. It's not that I don't understand the text. It just feels like as if I'm reading a book starting from the middle without knowing the beginning. All of them seem to have different kinds of feelings about God, but yet, he is praised in all of them since he is thought to be the most powerful being.

Here's a part from the first one I read (Psalm 23):

"Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me." (Psalms 23:4)

Here, the speaker, David, definitely shows that he believes in God and he has a lot of confidence since he is so sure that God will protect him all the time.

Psalm 42 seems to be questioning God. But at the end, God is still praised since he is anyways the father of everything.

Psalm 51 seems to be asking (begging) God for a favor since he is the most powerful being.

Psalm 137 was a bit different. The character that was speaking seemed to be remembering something that happened. But anyhow, God is still mentioned and is respected.

So, my conclusion would be that the psalms are all little bits of texts for us to believe in God and to be reminded about his greatness.