act of believing

See: credence
References in classic literature ?
Nietzsche's obvious moral, however, is that great scientists and thinkers, once they have reached the wall encircling scepticism and have thereby learned to recover their confidence in the act of believing, as such, usually manifest the change in their outlook by falling victims to the narrowest and most superstitious of creeds.
It is the act of believing itself that unites us," Bryant said.
Instead, he built common ground and understanding between the faiths by celebrating their shared act of believing.
For present purposes we may define the act of believing in practical terms, distinguishing it from other thought processes, including cognitive or intellectual acts such as calculating or logic, and affective activities such as liking, loving, or hating.