holding that only material phenomena can be known and knowledge of spiritual matters or ultimate causes is impossible
<adj.all>
denying or questioning the tenets of especially a religion
<adj.all> a skeptical approach to the nature of miracles
Unbelieving \Un`be*liev"ing\, a. 1. Not believing; incredulous; doubting; distrusting; skeptical.
2. Believing the thing alleged no to be true; disbelieving; especially, believing that Bible is not a divine revelation, or that Christ was not a divine or a supernatural person. ``Unbelieving Jews.'' --Acts xiv. 2. ※ -- {Un`be*liev"ing*ly}, adv. -- -- {Un`be*liev"ing*ness}, n.