Human misery is so appalling nowadays that if we allowed ourselves to dwell on it we should only add imaginary miseries of our own to the real miseries of others without doing them any good.
Be always displeased with what you are if you wish to be what you are not. Always add, always walk, always proceed. Neither stand still nor go back nor deviate.
For example, the tiny ant, a creature of great industry, drags with its mouth whatever it can, and adds it to the heap which she is piling up, not unaware nor careless of the future.
In a virtuous action, I properly am; in a virtuous act, I add to the world; I plant into deserts conquered from Chaos and Nothing, and see the darkness receding on the limits of the horizon.
If you expect to continue to purchase stocks throughout your life, you should welcome price declines as a way to add stocks more cheaply to your portfolio.