Dearly beloved, I beseech you as strangers and pilgrims, abstain from fleshly lusts, which war against the soul. Having your conversation [behavior] honest among the Gentiles [unsaved]: that, whereas they speak against you as evildoers, they may by your good works, which they shall behold, glorify God in the day of visitation. 1 Peter 2:11-12
The unsaved love to bad-mouth the church, and if you're a Bible believer, they especially love to lampoon and ridicule you. You must live a clean life—a righteous, godly life. Root out what 1st Peter 2:11 calls “fleshly lust.” Renounce and abstain from what is wrong. Embrace all that’s right.
Certain things war against the soul. The word “war” here is not the idea of hand-to-hand combat, but of a strategy, a conspiracy. There is a conspiracy born in hell, my dear friend, that wars against your soul, the soul of your family, the soul of your church, the soul of this nation. We are at war with unseen forces from the very pit of hell. To be prepared for the battle, first you must be absolutely and totally clean. A child of God ought to be pure and clean as the driven snow.
Be mindful every day to live such a pure, godly, clean, righteous, honest, forthright life, that even those who hate you will grudgingly have to admit there is a difference.