I'd like to share a Piper quote...related to the text of Hebrews 3:13.
"Satan, the world and the flesh are trying to harden, dull, blind and deafen the soul. And we are in each others lives with word-saturated exhortation to keep the soul alive and sensitive and supple and touchable by the word of God and the Spirit of God." -John Piper
And here are a few more verses on the same line of thought...
"See that no one repays evil for evil, but always seek to do good to one another and to everyone." 1 Thess. 5:15
"And let us consider how stir up one another to love and good works..." Hebrews 10:24
(Some other references if you wish...1 Cor. 12:25; 1Pet. 4:10; Eph. 5:2; Eph. 4:32; Heb. 10:25; Col. 3:13; Eph. 5:19; Rom. 15:5;2 Cor. 13:11; Rom. 12:10...)
I think this is a fascinating and really convicting subject...something the Church could stand to learn a lot about.