‘Belief that,’ ‘belief in’

Managing our beliefs takes effort, but it is one of our most important tasks. Understanding how and why we believe gives us the opportunity to take positions that are true, likely, and useful.

Pink rose. https://commons.wikimedia.org/wiki/File:Rosa_%27Exotic_Sunset%27_(d.j.b).jpg

The phrase “to believe that” generally refers to whether we accept a proposition as fact. Typically we are prepared with some kind of evidence or reasoning. Example: “I believe that this seed will grow a pink flower because it…