In "God's Word for Today" Steve Oliver writes:

Especially if we have been in church our entire lives and have heard the message of salvation repeatedly, it is easy to take salvation for granted. Being saved can just become a “normal” part of life, and we may lose the freshness of the experience. We may also forget the incredible cost of salvation and perhaps never realize the vital part that redemption plays in God's plan for world history. One of the dangers of this complacency is that we fail to value our salvation sufficiently, so sin can become “no big deal.” We also forget that redemption proves beyond any doubt God's love for us, the central place that the atonement holds in His plan, and the lengths to which He is willing to go to provide for our salvation.

Discussion: How have you seen such complacency affect the spirituality of Christians?
Source: Christ, the Triumphant Lord: Adult Teacher's Insights, page 33.