Is Footwashing a Biblical Requirement?

In John 13:14-15, Jesus tells His disciples, “If I then, your Lord and Master, have washed your feet; ye also ought to wash one another's feet. For I have given you an example, that ye should do as I have done to you." Does this mean the practice of footwashing is a biblical requirement, or did Jesus only mean that believers should look for practical ways to serve one another?Dr. David K. Bernard answers this question with a review of both the Scriptures and the history of revival movements, ...