The simplest method is to see if the beliefs pass the test of debate. If a friend wants to challenge your belief system, don't evade the test. Truths should emerge even stronger and clearer the more they are debated.
不過最簡單的方法，就是看看這種理論是否能禁得起教義辯答，如果朋友要「挑戰」你的新信仰，別逃避，真理應該是越辯越明的。