Security comes from earning it-not seeking it.
What it takes to win is simple, it's not easy.
When it's too hard for them, it's just right for us.
If you believe you are doing a good job in which you enjoy and like, then don't resign regardless of the pressures.
The age factor means nothing to me. I'm old enough to know my limitations and I'm young enough to exceed them.
Plan your work and work your plan.