1 John 2:15-17
15 Love not the world, neither the things that are in the world. If any man love the world, the love of the Father is not in him.
16 For all that is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world.
17 And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever.

It is interpretative we keep our self unspotted from the things of the World. That doesn't mean we are not supposed to enjoy life and do things but it does mean we need to watch our steps and don't get rapped up in something that could cost out place in heaven.