I don't like to think about what it means that I have so much while many millions of God's own people have so little. Lots of us are right there with that rich man. There's got to be more than getting stuff and doing stuff. Jesus and Paul started it. Grace is what changes a person's focus and makes us see things, and want to do things, in ways people ought to if they want to grow more than they want to shrink.
Grace is about receiving more than doing.
But, much of the time, I really don't know what I think grace might be other than a Sunday School word that I keep looking for on other days of the week. A teacher of mine gave me one pretty good tool for thinking about grace. About how we really get a look at God and a feel for life. Jesus put flesh and bones around the heart of God. And, using that human body asked us, still asks us, to let go of stuff and follow him to a place where we can meet God.