The Scourge of Intensity

Christians can get intense about everything from the serious to the mundane. Keeping a good sense of humor and developing the ability to have fun can go a long way in making your co-workers and employees more open to you when something serious needs to be discussed.
Using the Bible as a way to beat people over the head on your own particular passions will only drive people away. They won't absorb what you are saying because you are so heavy handed in expressing yourself. Manipulating the Scripture to fit each and every view or sin is in itself sinful.
I really enjoy a Christian with a passion for the Lord. I know several young men who can stand on a sidewalk, in an unfamiliar town, and joyfully sing, pray, and preach the Word. They have the mission for evangelism and they bring people to the Lord with their knowledge and enthusiasm. This kind of evangelism doesn't transfer very well inside most work places. Being alive for God is where we all want to be in our daily lives. Knowing when and how to use that passion, to bring the most gain to the Lord's work, takes some thought and prayer.
I've watched "on fire" Christians brow beating, turning every single conversation and event into a sermon, arguing every day situations as a part of their doctrine and pretty much causing people to run the other way every time they see these Christians approaching. In the work place, this can cause real problems if you are going outside workplace procedures and employment laws. A loving heart and treating your co-workers and employees with that sensitive Christ-like love draws the non believer to the Lord.
Isaiah 43:10-11 "Ye are my witnesses, saith the Lord, and my servant whom I have chosen: that ye may know and believe me, and understand that I am he; before me there was no God formed, neither shall there be after me, I even I, am the Lord; and beside me there is no savior." The Lord has very definite instructions for how we shall honor Him and His role and ours. We must never shrink from our firm belief and witness to the Lord. How we do this in the workplace is a measure of how well we understand what gains the most for our Lord. Being stubborn about how we present the Holy word in the workplace is not actually being a good witness for the Lord. Praying for the best way to be that witness and then being a good example in a humble manner, crediting the Lord when you can, and showing how a Godly person lives and works can work miracles.