That is an unfortunate aspect of human nature - "Can I get away with this and still be okay? I can do this and I'll still be a christian."
To live for God easy is hard.
To live for God hard is easy.
In other words to live on the edge, doing what pleases you and making sure you don't cross the line into not-a-christian-anymore, is a hard life to live. You are always struggling with the balancing act. To live for God wholeheartedly is easy - you don't have to worry about crossing the line because you're nowhere near the line.
Also, the flesh gives you a lot less trouble when you kill it daily.