If it does not, then we really cannot be sure of anything (spiritual or not), and we end up either an agnostic, unsure if we can really know anything, or a pluralist, accepting every position because we are not sure which, if any, is right.
Kung hindi, hindi tayo makatitiyak sa anumang bagay (espiritwal man o hindi) ay tayo'y magiging mga agnostiko na hindi tiyak kung malalaman natin ang isang bagay, o kaya tayo'y magiging pluralista, na tinatanggap ang lahat ng paniniwala dahil hindi natin alam kung ano ang katotohanan.