The implication of the washing of feet becomes clear when we consider the Bible's teachings on Christian living. Every believer who has been cleansed through baptism has the duty to imitate the perfection of Christ Jesus. The sacrament of the washing of feet is the Lord's invitation to His followers to participate in His divine nature (see 2 Peter 1:4).
To be like Christ requires that we forsake our sinful way of life in the past and walk with the Lord in our daily lives. We need to keep our feet from sinning by obeying God's Word, for the Word of God is "a lamp to our feet and light for our path" (Psalm 119:105). Through the constant guidance of God's Word and the help of the Holy Spirit, we will be as pure as Christ and walk side by side with Him on our journey to heaven.
The Lord Jesus also demonstrated His love and humility when He washed His disciples' feet. "Now that I, your Lord and Teacher, have washed your feet, you also should wash one another's feet" (John13:14). Imitating Christ not only involves preserving purity, but entails sharing His love with others. Christians are called to support one another by humbly serving, encouraging and forgiving each other.
The sacrament must be carried out in the name of the Lord Jesus, since the sacrament is performed on behalf of our Lord, and it is by His name that we are cleansed and saved. In accordance with the example the Lord Jesus has set, the worker conducting the sacrament pours water into a basin, washes the candidate's feet and dries them with a towel.
The worker who administers the sacrament represents the Lord Jesus; this duty is thus generally delegated to church ministers who have been ordained to serve (such as elders, deacons and preachers).
extracted from True Jesus Church: Our Basic Beliefs - an Introductory Brochure