Perhaps an comparison will answer your question. You used a computer to ask this question. You used the internet. Neither are mentioned in scripture as acceptable means of learning or inquiry. So by your logic, you are sinning. Does this make sense to you? Is it consistent with the character of God as revealed in Scripture? No; clearly not.
A better way to interpret Scripture is to take literally what it literally says, and to take lightly what it does not say. Otherwise anyone can make the Scripture support or prohibit just about anything, because it is not specifically addressed. This is not adding to Scripture, because it is not claiming that whatever issue is addressed; rather it is taking what is clear and applying it with consistency to what is not clear.
A better way to interpret Scripture is to take literally what it literally says, and to take lightly what it does not say. Otherwise anyone can make the Scripture support or prohibit just about anything, because it is not specifically addressed. This is not adding to Scripture, because it is not claiming that whatever issue is addressed; rather it is taking what is clear and applying it with consistency to what is not clear.
God specifys how we are to worship (in spirit, sing, lords supper, etc)
God does not specify how to go and peach the word (mark 6:15)
But he says do all things through his authority (Colossians 3:17 in the name of the lord a.k.a. By his authority) if he doesn't authorize it in his worship (through scripture) the it is sin