I agree, killing is ending a life, so techinically suicide and murder are both forms of killing; however, it is a totally different mindset. Consider this: Timothy McBay, the bomber of the Government building in oklahoma city had two brain tumors that were pushing on ihs frontal lobes. The frontal lobes are theorized to control things like decision making. The person who commits suicide, for the most part, expereinces a totally different medical problem, called depression (an imbalance of chemicals in the brain), which does not effect the frontal lobes. The effects on the brain would create a difference in reactions to the ideas of killing or harming others (compared to harming ones self). The mindsets would be different. Not to mention, hurting ones self is not the same as hurting others. Suicide is wrong, dont get me wrong, but people who are ok with hurting themselves may not be ok with hurting others.