Ethics in Psalms

I looked up the definition of ethics before I began to look at the book of Psalms. The definition I chose from many is as follows, the rules of conduct recognized in respect to a particular class of human actions or a particular group, culture, etc. To explain it even more, ethics are principles that layout the way one should go about living.
The book of Psalms is filled with reverence to God as the creator, protector and rescuer of His people. God's role as protector and rescuer is describe in this warrior-like way. For instance, in Ps 35:1-3, the writer is saying to God come and rescue from my enemies and destroy them that try to destroy me. Another example of this can be found in Ps 55. In this Psalm the writer is praying to God to come down and rescue him. He wants God to defeat his enemies. These Psalms not only protray God as a warrior and hero but also as the one His people can g to in their times of need.
The ethic in the Psalms is basically if you live of life of fear of God and believe that He is the most high, He will not cast you away to the "pit" he will destory you. In the context of the original text this was a very livable ethic. This from a time of war, captivity, etc. So the followers of God (Israel), had faith and knew that God was on their side in battle and life in general. They had faith because God had proven to them many times before, for instance at the Red Sea. If we put this is the context of believers today, unlike the Israelites, we are fighting spiritual battles not physical ones. This battles are tests of your faith and may be physical things you go through (i.e. illness) and spiritual (i.e. someone questioning your faith). In this context, you may not pray to God that he destroy (unless it's an illness or something) your enemies but rather Him just show them/it through you that He is God and you are His. What I mean by God showing Himself through you, is that you are able to be strong, steadfast in your faith and unmovable, no matter what may come your way.