Redound
Redound is a formal word that when paired with to means “to have a particular result.” It is often used in one of two idioms: “It redounds to someone's credit/honor” is used to say that a person deserves credit/respect for having done something. “Redound to the advantage of” means “to benefit (someone or something).” Redound is also sometimes used as a synonym of accrue and reflect.
Pareidolia
Pareidolia refers to the tendency to perceive a specific and often meaningful image in a random or ambiguous visual pattern.
Helen Keller
Keep your face to the sunshine and you cannot see a shadow.
Caustic
In general contexts, caustic describes bluntly and harshly critical remarks, statements, or ways of being and communicating, as in "a caustic remark" or "caustic humor." In contexts involving chemistry, caustic is a synonym of corrosive, and is used to describe things capable of destroying or eating away matter by chemical action
Assay
Assay is a technical word meaning "to test something (such as a metal or drug) to find out what it contains or to assess its value."