Very intentionally, my faith has become engrained in every part of who I am and how I live my life. At the same time, I've also striven (successfully) to live non-threateningly - anyone who's talked about "God-stuff" with me knows that I'm not out to "convert" them - I'm just being me, and being me involves talking about God.
When it comes to inviting friends (and I am truly blessed with coworkers I also call "friends") to church, I want to make it clear: I'm not trying to "save" you. That's between you and God. What I am trying to do, is share with you the unearthly peace, and hope, that my faith gives to me. My faith is the reason why I am an eternal optimist, and can remain so even while I'm frustrated or disappointed or hurt or whatever; in no way am I delusional about earthly life's reality - I just live for something else.
Months ago I read an article that articulated this so much better than I can. Thank goodness for Google, who helped me find it in .42 seconds: http://www.huffingtonpost.com/angela-jamene/what-people-are-really-th_b_4306949.html
It's short, I hope you'll take 2 minutes and read the whole thing (4 minutes if you're like me and not a fast reader). But if you don't read it, then let me highlight a sentence I think summarizes the piece: "Every invitation to church is an 'I love you and I want this indescribable love, peace, and joy for you because I genuinely care about you.'"
If I invite you to one of my churches, it's because I love you, I love my church communities, and I want you to have a vibrant life that you love, and that is full of hope. The only way by which I know that to be possible is through my faith, and that's why I want to share it with you.
I refuse to keep this buried deep inside of me
Yeah this little light of mine, it's time to let it shine a bit
'Cause there's no point in hiding it
It's everything I am
The source of all my hope
And it's the reason why I stand
And I pledge allegiance to being somebody real
There's no more holding it back
I'm showing them how I feel
'Cause love is more than a word
It's a noun, and a verb, and hiding it's absurd