Grace essentially means gift. Everything we have received from God is due to his divine gift, his grace. In a fallen and broken world, where we are both the victim and the perpetrator, grace is the only way we experience God; and showing grace to others is the best way to display God to the searching world around us. In a fallen and broken world full of fallen and broken people, grace may seem out of place, powerless, and extremely difficult to give; but grace is always necessary. The church is the greatest recipient of God's grace; therefore we should be great at giving grace to others.
"The Gospel" is the be all and end all catchphrase of Christianity; but, oddly, the meaning of the Gospel is something heavily debated and many Christians find themselves not being able to articulate or explain what the Gospel of Jesus Christ actually is.