Test in own experience.

"Do not go by revelation; do not go by tradition;

do not go by hearsay; do not go on the authority of sacred texts; do not go on the grounds of pure logics;

do not go by a view that seems rational; do not go along with a considered view because you agree with it;

do not go along on the ground that the person is competent; do not go along because the recluse is our teacher."
"Come and see for yourself - Ehipassiko"

"Just as gold is tested in fire for purity, so too, test my words in the fire of your own spiritual experience." Buddha