Colossians 2:18-19 Let no man beguile you of your reward in a voluntary humility and worshipping of angels, intruding into those things which he had not seen, vainly puffed up by his fleshly mind, And not holding the Head, from which all the body by joints and bands having nourishment ministered, and knit together, increased with the increase of God.
‘Let no man beguile you of your reward.’ Let no man take your prize. You have found Christ and been made free from sin by the gospel and the Holy Spirit. You started in the spirit so do not let any man induce you to finish in the flesh (Gal. 3:1-5).
‘Voluntary humility and worshipping angels, intruding into those things which he has not seen, vainly puffed up by his fleshly mind.’ Five facts about false cults:  Self-imposed fastings and self-denials of many things to appear religious, that is not forbidden in Scripture – touch not, taste not and handle not (2:18, 20-23).  The Greek word threskeia means worshipping (2:18) and religion (Acts 26:5; Jas. 1:26-27). Here it is a cult or religion of angels and demons (2:18, 23; 1Tim. 4:1-8).  Religion that is based upon visions that are supposed to come from God and angels (2:18; Deut. 18:1-22; Jer. 23:1-40; Ezek. 13:1-23).  Religion that is based upon the superior knowledge, new discoveries, occult secrets, piety, and sensuous feelings (2:18, 8; Rom. 1:21-23; 1Tim. 6:20).  Religion that is not Christ-centered and true to the gospel (2:19; Eph. 4:14; 5:11-12; 2Cor. 11:14-15; Matt. 7:15)
‘Holding the Head, from which all the body by joints and bands having nourishment ministered.’ Not acknowledging the Head of the body (Christ) on whom every member depends for nourishment and life.