Walk By Faith Not Appearance – EGP Blog post from January 9, 2013

I’m sure you’ve all heard before, but what you may not know is that the word translated “sight” (εἶδος [] eidos, pronounced i’-dos), literally means “appearance or form.” So, what this verse is really saying, is that true Christians walk by faith (in God, through Christ, by the Holy Spirit), not by appearance (i.e., simply “looking like a Christian” by doing things Christians supposedly do). True Christians aim to please God, not other people.