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If You Want to Change, Don’t Read This - Tomas Chamorro-Premuzic - Harvard Business Review

…A seminal review showed that we become more prudent, emotionally stable, and assertive with age, while our energy and intellectual curiosity dwindle after adolescence. In other words, as we grow older we become more calm and mature, but also more passive and narrow-minded.
A more interesting question is whether categorical changes are feasible. Can someone be extremely introverted at certain age, but super outgoing at another? Can someone transition from being a self-centred narcissist to being a caring and giving soul? Or from being exceptionally smart to being incredibly stupid?
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As a consequence, deliberate attempts to change are far less effective than we like to think, which is why most New Year’s resolutions are never accomplished — and why our long-term happiness levels are fairly constant and relatively immune to extreme life events (whether it is a painful divorce or the joys of winning the lottery).
Needless to say, some people are more capable of changing than others. Ironically, those individuals tend to be more pessimistic about their very chances of changing. Indeed, neurotic, introverted and insecure people are more likely to change, whereas highly adjusted and resilient individuals are less changeable. Likewise, optimism breeds overconfidence and hinders change by perpetuating false hopes and unrealistic expectations.
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In short, change requires self-critical insight, humble goals, and indefatigable persistence. It means going against our nature and demands extraordinary levels of willpower. …