Your security will come first and foremost from being an attractive prospect to employers, and that attractiveness involves having the abilities and attitudes that an employer needs at the moment. Japanese saying Do or do not. There is no try. It is what I have done and where I have been that should be of interest. Even if you're on the right track, you'll get run over if you just sit there.
Stupidity is forever.
The problem is to know the difference. Sciences A man, viewed as a behaving system, is quite simple. The apparent complexity of his behavior over time is largely a reflection of the complexity of the environment in which he find himself. The purpose of perception is to defend us from having to think. That portion of a work that is most often lost upon its audience.