A doctor can't assist or help someone with cancer unless he confronts his patient with the unwelcome reality of the disease. Christians can't assist someone with sin (spiritual cancer) unless they have an initial confrontation; but at the same time, we have to keep in mind that we're not adversaries. In fact, we are required by God to admonish one another. 1 Thessalonians 5:14 says,
“We urge you, brethren, admonish the unruly, encourage the fainthearted, help the weak, be patient with everyone.”
The word for "admonish" means to offer instruction through warning. "You do have cancer, but we can fix it." Would you? Vine's Expository Dictionary of New Testament Words says of admonishment, "The difference between 'admonish' and 'teach' seems to be that, whereas the former has mainly in view the things that are wrong and call for warning, the latter has to do chiefly with the impartation of positive truth."
Cancer's ugly. Doctors don't like telling people that they have it. But it's the first step to assistance.
"For the entire Law is fulfilled in in this one word: "You shall love your neighbor as yourself."—Gal 5:14