St. Symeon the Theologian

John tells us that we should neither love the world nor the things of the world. (1 John 2:15-16)} But what is "the world"? What are the "things that are in the world"? Listen! It is not gold, sliver, or horses, or mules. All these things that serve our physical needs we ourselves possess {even though we are monks}. It is not meat, nor bread, nor wine, for we ourselves partake of these things and eat them in moderation. It is not houses, nor baths, nor fields, nor vineyards, nor suburban properties, for great and small monasteries consist of these. So what is the world? It is sin, brethren, and attachment to things and passions.

The Discourses, St. Symeon the Theologian