If you experience the joy of Christ, let it be seen by all. Sharing it with others can potentially save souls. I am thinking about some of the friends and others I knew who had shockingly committed suicide. If I had shared my joy with them, I possibly could have made a difference. It's a balancing act because we can't always pop up and tell them about Christ if the timing is not right. Still, it's better to err on the bold side than being too cautious. You should not worry about offending your subject if the Lord does provide an opening. And always follow the prompting of the Holy Spirit, never your own inclination.