Truth is a peculiar thing. Its existence is believed in by nearly everyone, but it's actuality is agreed on by very few.
By its very definition, truth is a constant. If something is true, should it not be true forever? Yet, we experience truth as a variable. It is always changing, and to determine the truth seems impossible. What were tenets of the past are now insupportable in our eyes, and what is applauded today, was once scandalous.
But to be certain of its reality, and not know what that reality is, is hardly helpful to us in making decisions, or having confidence in our beliefs. It is in vogue these days to preface one's opinions with
"This is my truth". This is, in a sense clever, because it automatically insures that whatever you are about to say, is in fact true, since no one except yourself can prove it to not be your experience. One's statements are therefore safeguarded by such "existential quantifiers". However, in subjectifying truth, one rids it of that universality, which makes it what it is, and lends it so much weight. Again, truth is relegated from a constant to a variable. Your "personal truth" statement is now somewhat lacking in meaning and potency.
So, how does one safely determine a more comprehensive truth? In a world with myriad ideas, opinions, and beliefs, truth, it appears, is somewhat of an approximation. Like an orbiting electron, which has a definite position, but whose whereabouts can only be known to us as a probability, we know there to be an absolute truth, about which we can only do our best to conjecture. So, seeing is truth hard to come by, and that no one really knows what it is, when in doubt, the "probability of truth" method can be a useful tool. Oftentimes the more people who believe in something, the higher the likelihood there is of it being true (for example, murder is wrong). Ideas with comparatively few followers are then less likely to be true, as is the case with most cults. However, this method is certainly not always accurate, and is not a rule which should be depended on. Considering that almost everyone believed in a flat earth for the longest time, it has often been incorrect in the past.
While it is good to keep an open mind, this post is not meant to encourage blind crowd-following.
And, while it is prudent to thoroughly consider something before believing in it, it is also important to show fidelity to that which is important to you, and remain strong in your innermost beliefs.