Moroni admonishes unbelievers to “turn… unto the Lord” before his coming—the logical way to prevent great anguish at that point.
Culture: Moroni describes the results of repentance as becoming “spotless, pure, fair, and white, having been cleansed.” “White,” in this context, means cleansed or the basic biblical imagery of becoming clean and spotless (Ps. 51:7, Eccl. 9:8, Isa. 1:18, Lam. 4:7, Dan. 12:10).