The psalms encourage me mostly because they are an honest portrayal of every emotion we have. I was astounded when I read thru them (if you take 5 a day, you go thru the entire psalms once a month). They say stuff I have NEVER heard echoed in church. Lots of praise and joy and happiness, but also lots of terror, anger, whining, fury (yeah, some of it at God!), confusion, insecurity... and raw hatred...., sometimes for God, sometimes for others, and sometimes you can't tell em apart.
In a weird way it makes me think, "ok, if David/Asaph/Solomon etc felt this way and said it to God, then I can be honest about what I am thinking/feeling." I could almost picture God chuckling saying "I knew what was in there, boy. Let's look at it and help you get this sorted out."