"Humanist beliefs stress the potential value and goodness of human beings, emphasize common human needs, and seek solely rational ways of solving human problems." (online Oxford Dictionary)
Surely the Christian would be happy with this. Well, perhaps we ought to hear what Jesus Christ himself had to say about it in the Sermon on the Mount:
"Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven. Many will say to me in that day, Lord, Lord, have we not ... in thy name done many wonderful works? And then will I profess unto them, I never knew you: depart from me, ye that work iniquity."
If the Christian is not acutely aware of this distinction, he becomes increasingly humanistic, and his Christianity becomes so watered down, it does not resemble the message of Christ at all.
Jesus was the Wayshower, but he was not a good person, in fact he rebuked the title "Good Master." He was very unpopular with "the good" people of his time. His whole mode of operation was to do his Father's will. If we accept that God is, that He is the Intelligence behind our being, why think we can do otherwise?