There is an email/blog ministry called Of First Importance that will send you daily gospel-centered quotes from various sources that has been a blessing to me.  You can sign up at http://firstimportance.org/.

Here's a great quote from the site:

Our faithful presence here on earth should provide a glimpse of what the life of heaven is like. We are to be a fragrance of the new world that is coming and a warning of the accompanying judgment. The church is the society where the kingdom of Jesus Christ is manifested and extended. — Trevin Wax

Counterfeit Gospels
(Chicago, Ill.: Moody Publishers, 2011), 165