The other day, I was watching Persuasion for the millionth time. The version with THIS guy:
Before you start querying, you hear about the "ups and downs," but I don't think you quite "get" it until you're up to your neck in rejections and close calls. There are a lot of downs, but there can also be some ups that really mend the damage the downs caused. Take the criticism and learn from it. Take the praise and don't let it go to your head. Continue to study your craft and strive to get better daily.
Let those rejections roll off, because just like in the novels, the heroine always ends up with the right guy.