Faith

a rational attitude towards a potential object of knowledge which arises when we are subjectively certain it is true even though we are unable to gain theoretical or objective certainty. By contrast, knowledge implies objective and subjective certainty, while opinion is the state of having neither objective nor subjective certainty. Kant encouraged a more humble approach to philosophy by claiming to deny knowledge in order to make room for faith--i.e., by distinguishing between what we can know empirically and what is transcendent, which we can approach only by means of faith.

* See Animal faith