Hope?

Here is something I have been pondering; this idea of hope. Hope is not logical and makes absolutely no sense but is good & important for us. Granted, we are not purely logical creatures but we still need hope to nurture our happiness & well-being. For example, if we were robots we would not need hope. These hopes maybe for our loved ones, friends, or pets. In other words, it is a balance between rationality and irrationality. What do you think?