Sorting Out 1 John 1:6: Down But Not Out

When John says, "if we say we have fellowship with God but walk in darkness we lie and do not practice the truth," who is he referring to? The false teachers? Antinomians? Nominal Christians? True believers who have sinned? True believers with besetting sins? True believers who have fallen into a pattern of sin? All the above? If yes to all the above, can the true believer lose fellowship with God? In this message we answer this important query.