As a single you have the freedom right now to explore, study, and tackle the world.
No other time in your life will offer these chances."This portrayal of singleness implies that Harris' perfect, Godly marriage will rob you of freedom!
Shouldn't a Godly marriage offer you and your husband/wife a fuller and better perspective to the learning each of you gain?
In my experience, marriage allows you to explore, study, and tackle the world as much as singleness does, but all of this is with someone that you can gain more appreciation of what you are viewing!
Harris shows us, through this view of singleness that maybe his view of marriage is coloring his view of dating.