Double-mindedness is a concept used in the philosophy and theology of the Danish philosopher Søren Kierkegaard as insincerity, egoism, or fear of punishment.
The first type of double-mindedness, willing for the sake of reward or out of fear of punishment, is akin to the distinction between intrinsic and extrinsic values.
Each type of double-mindedness is a human weakness and an obstacle to an individual pursuit of greatness and strength towards willing and reaching the Good.
[3] To counter double-mindedness, Kierkegaard argued that discipline and clarity of the self is essential and necessary.
He believed that double-mindedness isn't evil but a person not recognizing that they are a self-contradiction and double-minded is self-deceit.