Occasionally in my travels I'll run across an individual who has become inspired by the Lord and is rightfully excited to give witness to that event. I love that they've found their path to salvation, and have dedicated themselves to walking that line as best we sinners can. I think those events can, and should be shared with others so they too can realize that salvation is simply one decision away.
There are a select few who call themselves into attention by taking this just a little too far. It's by far a minority, but then when you claim God spoke directly to you that is an extremely rare event! When people say to me, "The Lord told me to do something," I want to ask them, "What does the Lord's voice sound like?" I'd also question if they were sure it was God who was speaking to them, because you see, there are only three recorded times in the New Testament that God spoke audibly to his only begotten Son. So that would make any individual who had that kind of interaction pretty darn special!
Now don't get me wrong, being a saved soul is "pretty darn special," but for your testament to have credibility with those who are not, I think it might be beneficial to bring that message down a notch. I'm certain the Lord filled you with the Holy Spirit and brought you to the revelation that Jesus Christ is your Savior, but professing that God spoke audibly to you is akin to having an alien encounter and just as unbelievable to the masses.
The point here is to be a leader and have others follow you to the enlightenment of God's word. For this to occur, you must be relatable. Even if God did speak directly in an audible voice, like He did at Jesus baptism saying,"This is my beloved Son, in whom I am well pleased," keep it believable for the mere mortals. Instead of saying to people, "God told me this, " the message maybe better received if you say, "I believe God is leading me in this direction." That's a more relatable and humble way to present your message, and the world needs more disciples to spread God's word.