Kalama Sutta

Do not simply believe what you hear just
because you have heard it for a long time.Do not follow tradition blindly merely
because it has been practiced that way for many generations.Do not be quick to listen to rumors

Do not confirm anything just because it
agrees with your scriptures

Do not foolishly make assumptions

Do not abruptly draw conclusions by what
you see and hear

Do not be fooled by outward
appearances

Do not hold on tightly to any view or idea
just because you are comfortable with it

Do not accept as fact anything that you
yourself find to be logical

Do not be convinced of anything out of
respect or deference to your spiritual
teachers.

You should go beyond opinion and belief.  You can rightly reject anything, which when accepted, practiced, and perfected leads to more aversion, more craving, and more delusion.  They are not beneficial and are to be avoided.

Conversely, you can rightly accept anything, which when accepted and practiced
leads to unconditional love, contentment, and wisdom.  These things allow you
time and space to develop a happy peaceful mind.

This should be the criteria on what is and what is not the truth; on what
should and should not be the spiritual practice.

THE BUDDHA-