Two things are required for the human experience. Consciousness is required for us to be aware of our (or any) Existence. Existence is required for Consciousness to have something to be conscious of. Both are axiomatic and foundational to life. Therefore, the highest purpose we each have is to establish experience in the subconscious and/or super-conscious mind. These experiences are the basis for personality, behavior, and morality. Our beliefs, decisions and direction are all based upon these experiences. They establish our goals, our fears, and our destiny.
It does not matter whether a person chooses to be a carpenter or a rocket scientist. It is the experience—diversified experience—that is the basis for perpetuating existence.
Since purpose lies in the variety and depth of experience, a career choice is only a matter of taste. Those who become frustrated with their choices are simply in need of more variety, or a change. Frustrations arise when the path being experienced is no longer necessary, has become redundant, or when the person is not yet ready for the particular path they have chosen.
There are easier and harder ways to accomplish life goals. When one is in the flow with their natural talents and gifts, the experiences will be more fulfilling on a deeper level. Synchronizing with karmic purpose will allow one to fulfill the self and put gifts to the highest use. While all experience can be purposeful, some experiences will get you to your destination quicker and more directly than others. It is your choice how fast you want to learn and grow. Some experiences and choices will even take you backwards—towards closing down, poofing out, and destruction. By poofing out I mean that the soul can eventually lose its energy and cohesiveness, disintegrating and eventually disappearing.
There is a particular feeling that can be sensed when one is on the right path and moving in purposeful experience. It can be subtle or it can be explosive. Oftentimes it is even more obvious when one moves off the path. If a person heeds these signs it will make it easier to stay on course.