Human hands wrote the Psalms. Even so, God stands behind them all. He has complete charge. He makes the rules for his own Psalms. He states this principle elsewhere in the Bible. “All writings are inspired by God.”
Psalms are amazingly interactive. When the reader brings her heart to bear upon her reading, God often responds by personally placing a word, a line, or a thought from one of the psalms directly into the intelligent or feeling portion of her comprehension. By this I mean that God brings the poem home into the reader’s heart and mind, applying what she is reading to her personally. It’s amazing and fun when this happens. Reading Psalms is like reading no other book.
This means that a psalm can change its emphasis with each reading. Just because you’ve read one once doesn’t mean you’ve finished reading it. Just as audience response affects performers on a stage, or a teacher interacts with her students, or a choir interacts with the music they are singing, or an orchestra interacts with the score or a conductor, so God himself can interact with those who read his Psalms. God is alive and present as you read.
This doesn’t mean I’m saying that Psalms can mean any old thing whatsoever that readers desire. The meaning must always stand within the nature, or character, of God. But critics often suggest that each line of the Bible has one exact meaning. They define that meaning as whatever they think the original human author meant when he physically wrote the words. Additionally, they enjoy limiting the meaning of portions of the Bible, including Psalms, to what they might imagine it meant to its original readers. I say “imagine,” because these critics weren’t there either when the Bible was written, or when a supposed “original” group of readers or listeners saw or heard it read.
For you who are reading this blog, that’s neither here nor there. For now, I just want to encourage you to pick up Psalms and read them for yourselves. You might be amazed to discover that God may choose to speak directly into your heart, which he often does for readers of Psalms. It’s totally delightful when this happens, even when he addresses the hurting and painful spots in your heart, like a doctor or a surgeon might your body. Always remember, God is love, and he loves you. He wants you to grow to love him, as well. Reading Psalms can help you do this.
 2 Timothy 3:16. See also John 10:35.