This can be passed from a parent who constantly belittles the child’s thinking.  Or the parent who acts like this themselves, the mother who is hysterical the father who is passive.  Or obsess about everything that is around them apart from the real problem at hand.  What happens is ones problem solving developmental strategies are compromised thus, thinking can be split of at times when it would be beneficial.  For example, a lack of consideration in relationships and not understanding why others are angry.  Or being totally helpless in situations in life and work where it is resolvable via thought, action and process.  Some individuals respond to problems, situations and relationships by being confused or feeling bad about the problem but not thinking about how to solve it.  It can be really uncomfortable when someone can feel incapacitated by this injunction and are stuck and despairing.  It can stop people working on their marriage, can be intimacy avoidant with ones children,  it can hinder reaching your full potential at work and get in the way of friendship.