"And everything that does not come from faith is sin." The Holy Spirit convicts people differently. To force your conviction upon someone else is unjustified, as surely their faith is not identical to your faith. (Granted, there are universal convictions explicitly revealed in scripture.) Our job is to glorify Christ and love His people. So love. And when necessary, speak truth... in grace. But please, don't judge someone whose convictions differ from yours, as surely their faith is different, too.