Charles M. Sheldon said this quote

Somehow I get puzzled when I see so many Christians living in luxury and singing 'Jesus, I my cross have taken, all to leave and follow Thee,' and remember how my wife died in a tenement in New York City, gasping for air and asking God to take the little girl too. Of course I don't expect you people can prevent every one from dying of starvation, lack of proper nourishment and tenement air, but what does following Jesus mean?

~ Charles M. Sheldon

What is it to be a follower of Jesus? What does it mean to imitate Him? What does it mean to walk in His steps?

~ Charles M. Sheldon

I am beginning to understand that I cannot interpret the probable action of Jesus until I know better what His spirit is. The greatest question in all of human life is summed up when we ask, 'What would Jesus do?' if, as we ask it, we also try to answer it from a growth in knowledge of Jesus himself. We just know Jesus before we can imitate Him.

~ Charles M. Sheldon