I'm reading Christopher Wright's, The Mission of God (sporadically). Today he drove home the idea that Israel was to serve as a blessing to the nations. By virtue of their relationship to Abraham (Gen 12:1-3), Israel would would cast profligate blessing upon "all nations."
Of course, Paul then expanded what it meant to be Israel, he expanded it to include outsiders. In doing so, Israel began to be a blessing, by incorporating we who are the outcasts, outside the circle, the unaccepted. But at the same time, as we become the insiders, we become Israel, giving the opportunity to spread the love, share the blessing.
Here we are though, often hording the blessing. We keep it for ourselves thinking that God has given it to us for our benefit. No. We are blessed to bless others. We are called to be part of God's mission in using our blessing, the opportunities it gives us, to flippantly bless others without requirement. We get to fly through life shedding blessing on others. Blessings only become burdens if we hold on to them. Lighten your load and bless someone!