FYI: the two points on the bishop's miter symbolize the Old and New Testaments. Miter as a transitive verb means to make a miter joint between two pieces of material, such as wood, or to make a diagonal join where the hems along two sides meet at a corner of the fabric.
Incense represents prayers rising to heaven. Frankincense, myrrh, or other tree bark or sap was burned in Old Testament times and is still. Pagans ripped it off.