“There are many different examples of respectable sins that we often overlook because they aren’t on the same level as open adultery or murder—but they’re just as deadly. Interestingly enough, the small venomous snake is often more deadly because they inject their venom without any restraint when they bite their prey. “
(Josh Buice – Delivered By Grace) The author of Hebrews sounds like a track and field coach explaining the need for proper attire and the danger of unnecessary resistance as he writes, “Therefore, since we are surrounded by so great a cloud of witnesses, let us also lay aside every weight, and sin which clings so closely, and let us run with endurance the race that is set before us” (Heb. 12:1). The Christian life is not a sprint—it’s a marathon. Who dresses in long jeans and bulky leather shoes for a marathon?
Not only is it essential to dress appropriately for a marathon or even a short race on the track, it’s imperative that Christians are properly clothed for the Christian life. Unnecessary baggage that clutters life can hinder us, harm our relationships, and create distance between Christian friendships in the local church. Much more severe than unnecessary baggage is the “respectable sin” that is often ignored because—after all, it’s not murder, child abuse, or embezzlement. Jerry Bridges, in his excellent book Respectable Sins, writes:
Those of us whom I call conservative evangelicals may have become so preoccupied with some of the major sins of society around us that we have lost sight of the need to deal with our own refined or subtle sins. 
What sin are you overlooking in your life that could be holding you back from a God glorifying pursuit of holiness? That one sin has become your achilles heel. Not only does it dishonor God, but it hinders you from shining for God, from serving God, and from pursuing holiness. Below are many respectable sins that often fly under the radar, but they should not be overlooked or ignored. Their poison is deadly too.