And yet, it is simple.
It is a cry: Please, God. It is a lament: Oh, God! It is a sorrow: Why, God? It is a joy: Praise God!
We can ask God anything or talk to Him about anything. We are not limited to our needs. We are not compelled to praise. We are not bound by rules at all. God longs for our friendship, our companionship. We were created for this. When we go to Him with all our burdens, all our cares, all our joys, all our longings, we can know that he waits to converse with us. He will reply. We have but to listen.
Prayer. So simple. Yet so profound.