This life. When lived with Christ, every single aspect of who we are and what we do becomes set apart. Our marriages become more than two people living together. Our relationships become more than what we can get out of them. Our lifestyles and workplaces take on a deeper meaning. Right desires drive us and an eternal purpose becomes the reason for doing what we do.
Just like a marriage relationship, this life is one lived with God and for God and by the grace He gives. As followers of Christ, washed in the blood, sanctified, and made holy, everything we do becomes sanctified and made holy, as well. It is no wonder we are admonished to do all to the glory of God. Our work, our friendships, our marriages, our relationships, how we act, react, interact, what we say, think, and view - everything can be used to bring God glory so everything in our lives is to be set apart.
I think I am only beginning to realize the full extent and beauty of this truth and the freedom it gives - freedom to live counter culturally, freedom to claim the promises of scripture and decide this life will be more than what the world around us says it is, more than what the culture proclaims it to be. It sets us free to live in the beauty of God's grace in every area of this life - and to do it well.