“Problems do not go away. They must be worked through or else they remain, forever a barrier to the growth and development of the spirit.”
Source: The Road Less Traveled: A New Psychology of Love, Traditional Values and Spiritual Growth
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M. Scott Peck 26
American psychiatrist 1936–2005Related quotes

Will he be back? https://www.theguardian.com/world/2009/may/28/arnold-schwarzenegger-california-terminator-budget-deficit, The Guardian, (May 2009)
2000s

Verwoerd in 1963, as quoted and translated by J. J. Venter in H.F. Verwoerd: Foundational aspects of his thought, Koers 64(4) 1999: 415–442

Quoted in David Kushner, Masters of Doom: How Two Guys Created an Empire and Transformed Pop Culture Chapter 16, p. 292.

Source: In a Different Voice: Psychological Theory and Women's Development

The Rickover Effect (1992)
Context: When doing a job — any job — one must feel that he owns it, and act as though he will remain in that job forever. He must look after his work just as conscientiously, as though it were his own business and his own money. If he feels he is only a temporary custodian, or that the job is just a stepping stone to a higher position, his actions will not take into account the long-term interests of the organization. His lack of commitment to the present job will be perceived by those who work for him, and they, likewise, will tend not to care. Too many spend their entire working lives looking for the next job. When one feels he owns his present job and acts that way, he need have no concern about his next job.
Attributed to Kenneth Boulding in: United States. Congress. House (1973) Energy reorganization act of 1973: Hearings, Ninety-third Congress, first session, on H.R. 11510. p. 248
1970s
Variant: Anyone who believes in indefinite growth in anything physical, on a physically finite planet, is either mad or an economist.