An excerpt from "Got Questions.org" entitled, "What Does it Mean to not Conform to the Pattern of this World (Romans 12:2)? states: "The Christian and the world are not to be “like-shaped.” That is, we should not allow ourselves to be pressed into following the corrupt customs, ungodly principles, or evil plans of action promoted by worldly men. The blessed man, according to Psalm 1:1, resists being conformed to the pattern of the world." This article may be viewed at: What Does it Mean to not Conform to the Pattern of this World?/gotquestions.org
Reference: Romans 12:1