There is a proverb which states: We either make ourselves miserable, or we make ourselves happy. ... It takes the same amount of effort.
If one takes an honest, introspective look at one's self, that proverb is an accurate statement.
Effort is a vigorous or determined attempt to accomplish something; a strenuous physical or mental exertion.
So effort takes strength, focus and a goal.
The results we get is equal to the amount of effort we put into the task.
Our mind is not our best friend. It tricks us every day. It makes "excuses" that allows us to procrastinate, take risks, go outside one's comfort zone under the security blanket of making sure we don't "get hurt." It may rain today, so I won't go outside to exercise (jog, run, walk). I won't give up soda because it will give me a caffeine withdrawal headache. It takes too much time to go out and meet new people.
Those excuses are in direct contradiction to one's own personal goals such as losing weight, meeting new people, getting out of a social rut, etc. You may want to change your life but your mind and will creates road blocks to starting a plan to achieve those goals.
It seems contradictory, but it may be the last vestige of basic animal instincts in man who for self-preservation was wary of strangers, the dark, animal noises, risky paths and painful experiences.
Every person is given 24 hours each day to use as he or she pleases. Free will gives us choices. those personal choices is what controls what paths we take during our lives. Some of these paths lead to happiness and fulfillment, while other paths lead us to loneliness and sadness.
In LOST, the vast majority of main characters were going down personal paths of unhappiness. For example, Jack chose to follow his father's career path as a surgeon, but that is not really what he wanted to do. His career path sucked the life out of him - - - turning him into a loner whose only purpose was to work at the hospital in order to get some recognition from his father.
Sawyer also chose to take his life down a dark road of revenge. He could have accepted his parents deaths for what they were, a troubled murder-suicide caused by being taken by a con artist. But there had to be something more than financial stress to cause such destruction of his family unit. Sawyer was given a chance by his uncle to become a fine young man, but Sawyer chose to copy the man who caused him grave pain. And once he fulfilled his goal of revenge, it left him hollow - - - he had led a meaningless life with nothing to show for it.
If Jack or Sawyer had put in the same effort on something more positive, a different career path, they would have been better human beings. They probably would not have been loners prior to Flight 815. They probably would have had their own happy families from the lessons learned in their own childhoods. Instead, they took the broken pieces of their lives and obsessed on them to the point of darkness.
Everyone needs to take stock in their lives on a periodic basis. Are you putting in the effort to be happy?