Sacrifice: We are urged to imitate “the grace of our Lord Jesus Christ, that though he was rich, yet for your sakes he became poor so that you through his poverty might become rich” (2 Corinthians 8:9). Giving at personal expense is exemplified in Jesus and commended throughout the Scriptures.
Paul Borthwick in Simplify: 106 Ways to Uncomplicate Your Life (Colorado Springs: Authentic Books, 2007).