According to Scripture, Creeps are most often responsible for introducing doctrine that is unfounded in the Word of God (KJB).  Amazingly, even the saints are unaware that those ungodly traditions and philosophies have entered in.  The saints should not only disagree but stand firm against that which is contrary to the Word. Ideas or opinion already adopted by the saints should be shaken off no matter how important the traditions have been to them or their families and friends and no matter how important, in the world, philosophical or ideological ideas are espoused by the masses.

Jude 1 (KJB)
 4 For there are certain men crept in unawares, who were before of old ordained to this condemnation, ungodly men, turning the grace of our God into lasciviousness, and denying the only Lord God, and our Lord Jesus Christ.

1 Timothy 1 (KJB)
9 Knowing this, that the law is not made for a righteous man, but for the lawless and disobedient, for the ungodly and for sinners, for unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,
10 For whoremongers, for them that defile themselves with mankind, for menstealers, for liars, for perjured persons, and if there be any other thing that is contrary to sound doctrine;

Titus 2 (KJB)
7 In all things shewing thyself a pattern of good works: in doctrine shewing uncorruptness, gravity, sincerity,
8 Sound speech, that cannot be condemned; that he that is of the contrary part may be ashamed, having no evil thing to say of you.