To believe in

To believe that the subject of the thought (if a person or thing) exists, or (if an event) that it has occurred, or will occur; - as, to believe in the resurrection of the dead.
To believe that the character, abilities, and purposes of a person are worthy of entire confidence; - especially that his promises are wholly trustworthy.
- J. H. Newman.
To believe that the qualities or effects of an action or state are beneficial: as, to believe in sea bathing, or in abstinence from alcoholic beverages.
- John xiv. 1.

See also: Believe, Believe, Believe

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.