We must commit to living truthfully. IF there is any place in our lives where we knowingly live a lie or where we agree to be deceptive, we have created an opening for spiritual attack. No matter how small the compromise seems to you at the moment, don't surrender to it. Satan will not allow such an opportunity to go unexploited. Small fibs have a way of becoming big lies.
Little sins committed in secret places have a way of bringing down the mighty.
If you don't believe it, read the story of David in the Bible. Read the story of Richard Nixon who was brought down by the petty plotting that led to the Watergate scandal and the destruction of his presidency. Committing to living in the truth will probably mean facing some unpleasant, even ugly moments. It might mean opening some dark secrets you've carefully hidden away to the light of Christ and making them right. Satan loves the secret sins that we have never confessed.