The pursuit of gaining an agent is very subjective; luck; timing plays a huge role in the process. What has helped me to continue, simply put it's my strength of thinking that in this vast world we all live in an agent will say "Yes." That is what I am holding onto it's not a glimmer of hope it's all about my continual focus. I love to write, I believe that's the best reason to pursue a career as an writer, without that I don't think the longevity of a career in writing will be possible. It's not about thinking you will be the next best seller on the various notable list or make a crazy amount of money because that may not happen and by far the worst rejection is if an audience does not responds favorably to a novel, therefore again luck and timing is the key.
I really dont think I would have the determination and tenacity to continue with the daunting task of querying and revisions to make my novel sparkle, without the support of my family being my pesonal cheerleaders.