Many Christian traditions formally recognize seven Works of Mercy as obligations that every Christian must perform. The warrant for six of the Works of Mercy is found in Matthew 25.31-46. The seventh Work of Mercy--burying the dead--was later added based upon Tobit 1.16-17.
I've always been fond of Ade Bethune's artwork depicting the Works of Mercy. Bethune was the artist who created the banner for Dorothy Day's The Catholic Worker and was a regular contributor of artwork for its pages.
These are the actions that define the Christian lifestyle.
The irony, of course, is that few Christians actually do any of this.