Doctrine... If someone is evil hearted they will scheme their way into some bad predicament. You could create a thousand rules and they will still continue to stir up more bad material. It is my opinion, then, that modern day words such as rapture or trinity, can be wonderful or terrible depending on who is presenting the material. An evil hearted person will enjoy scheming his way into situations and going around the rules. The Apostles had the same problems in their day...
13 Who is a wise man and endued with knowledge among you? let him shew out of a good conversation his works with meekness of wisdom.
14 But if ye have bitter envying and strife in your hearts, glory not, and lie not against the truth.
15 This wisdom descendeth not from above, but is earthly, sensual, devilish.
16 For where envying and strife is, there is confusion and every evil work.
17 But the wisdom that is from above is first pure, then peaceable, gentle, and easy to be intreated, full of mercy and good fruits, without partiality, and without hypocrisy.
18 And the fruit of righteousness is sown in peace of them that make peace. - James 3