I went back to Philippians to see what Paul had to say about sharing. What an awesome example of that! He wrote a book about rejoicing in the Lord while he was in prison!!!
~Philippians 1:14 -- "...and that most of the brethren, trusting the Lord because of my imprisonment, have far more courage to speak the word of God without fear."
While the verse above talks about what we generally think of as sharing (speaking), the ones below focus on a different kind of sharing...
~Philippians 2:17-18 -- "But even if I am being poured out as a drink offering upon the sacrifice and service of your faith, I rejoice and share my joy with you all. You too, I urge you, rejoice in the same way and share your joy with me."
~Phil. 4:14 -- "Nevertheless, you have done well to share with me in my affliction."
It struck me that seeking joy and sharing that with others is such a strong testimony. And it's just plain encouraging to other believers. What a blessing of being part of the body of Christ. =)