No one whose senses have been exercised to know good and evil but must grieve over the sight of zealous souls seeking to be filled with the Holy Spirit while they are yet living in a state of moral carelessness or borderline sin. Such a things is a moral contradiction. Whoever would be filled and indwell by the Spirit should first judge his life for any hidden iniquities; he should courageously expel from his heart everything which is out of accord with the character of God as revealed by the Holy Scriptures.
– AW Tozer –