A lot of Christians maybe wondering if the principles prescribed by Paul in Romans 6 really work against their battle against sin.
They somewhat tried the principles of a) realizing that they died with Christ and was raised with Him, b) they reckoned that they are dead to sin and alive to God in Christ and c) then they rendered themselves to the service of righteousness, and yet, in their experience, they seem to fall into sin over and over again.
And so they asked: "Does it really work?"
Reply:
There are many people who know the mechanics of how to float on water lying on their back and yet fail to put it into practice in actual experience, and then there are people who do not only know about the mechanics, but more than that, they really do float on water, applying the principles.
Does this mean that the principles do not really work just because there are people who fail to float on water with the head knowledge of how to do it?
No, the principles will work for everyone. The problem is not in the principles but in the inept application of the principles.
It's the same way with the principles enunciated by Paul in Romans 6. A lot of Christians have head knowledge of the mechanics but they bungle it when it comes to actually putting it into practice.
Either one or two or all three are not truly and consistently applied. Thus, the failure.