Many people turn to fortune tellers, psychics, and horoscopes for hope. Faith in this hope (false hope) has ruined countless lives.
Many unsaved people practice astrology (i.e., horoscopes) and other unscriptural use of the signs in the heavens. Believers should reject these practices.
What if God was true, but on a limited basis? This would be a cause for great concern; however, this is quelled by the fact that He is both true and faithful.
