Here is the secret to remain forever employable

When I was in my early 20s, I was excited to break into my career that allow me to leverage my skills, interests and market realities.
When I turned 30s, I was paranoid about gaining the seniority, security, salary, and fulfilment.
When I entered into 40s, I am concerned about sustenance, stability, and belongingness.

Through all these career transitions, I can assure you that instead of being excited, paranoid and concerned, I need to ensure that my efforts, career paths, and viability as valuable person of organisation, society, communities and continued disciplines can only make me forever employable.