Specifically, Binyamin tells us in these times this refers primarily to strengthening and encouraging other people in Emunah and Bitachon.
"Emunah" is the unshakable certainty that God controls every detail of this world and it's events -- and in the end the outcome will be for the good, while "Bitachon" is the ability to live life with that confidence and make decisions based on it.
Why is the emphasis on helping other people? That's easy: To be a spreader of Emunah, Bitachon, positive attitudes and healing words, a person first increases his own constructive thoughts, words and actions. Then, he is more able to be a helper to his friends and family.
Everyone is looking for 'light' these days. The most comforting light is the one that emanates from a Jew with Emunah and Bitachon.
That's you. It's meant to be you. That's what being a "light to the nations" is all about.
And fortifying your Jewish Future is the first step.