What does it mean to be a fully devoted follower of Christ? 

From Leading Life-Changing Small Groups by Bill Donahue

Grace.

Christ followers understand and have individually received Christ's saving grace. They have abandoned all attempts to earn God's favor through accomplishments of their own.  They find security only through Christ's sacrificial death on their behalf.

Growth.

Christ followers know that the grace of God that saved them is only the beginning of His work in them. They gratefully respond by actively pursuing a lifelong process of spiritual growth in Christ by seeking to become conformed to His image. To this end, they consistently nurture their spiritual development through prayer, worship, and Bible study.

They regard the Bible as the final authority in all areas that it teaches about and desire to be wholly obedient to it. Christ followers honestly confront areas of personal sin and engage the Holy Spirit's power in seeking to turn from sin.

Christ followers also desire to extend the grace they have received to others through personal evangelism and participation in the collective ministry of the church in their community, their country, and around the world.

Group.

A Christ follower honors God's call to participate in community in order to grow in Christ-likeness, to express and receive love, and to carry out the ministry of the church.

For this reason, Christ followers give priority to attending the corporate gatherings of the church for the purpose of worship, teaching, and participation in the sacrament of communion.  They are connected relationally to a small group of believers for the purpose of mutual encouragement, support, and accountability.

Gifts.

Christ followers recognize that the church is composed of interdependent members, each uniquely gifted by the Holy Spirit for the purpose of building up the body and furthering the ministry of the church. They, therefore, seek to discover, develop, and deploy those God given gifts. 
They seek the church as a place of service and for support and affirmation of other believers.

Good Stewardship.

Christ followers realize they have been bought with the price of Christ's blood and that everything they are and have belongs to Him.