“Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;” (2 Corinthians 10:5)
It's not just the Preacher's job or the Deacon’s job to strive for Holiness. We are called to have the mind of Christ and walk in his footsteps. We as Christians are called to be a separate people, not bending to the ways of the world and its various worldviews. We should live and do everything within the Biblical Christian Worldview.
In Exodus 19, The Israelites needed to be sanctified and clean before they could meet God at Mount Sinai. The Israelites had to be ready for this very special occasion. God set bounds for them so that they wouldn't step onto the mountain or its boarders. The Israelites around the mountain would be put to death if they didn't keep outside the boundaries. After their preparation, God showed up in a mighty way with thunder and lightning, thick smoke and quaking ground, and then he called the Israelites with a loud voice. After they gathered at the base of the mountain, God shared His 10 Commandments with His people. We also need to clean ourselves up and set ourselves apart (sanctify ourselves), before we worship or meet with God. The Law within the Word of God clearly marks our boundaries, and states the rewards for keeping those boundaries and the consequences for failing to keep the boundaries. Before coming to worship we should practice the discipline of confessing and repenting of our sins, so that we can be clean and sanctified before our God. Then we can worship our Lord sanctified, forgiven and with the proper honor and respect.
We must remember that God's grace does not excuse us from our requirement to strive to be holy and obedient servants of God.