Trust, take refuge in THIS realization of the self as light. We traditionally think of Buddhism as fundamentally concerned with the problem of suffering and how to end it. We all come to practice seeking some refuge from our suffering. The dharma is light. The dharma is both the word we use for the Buddha's teaching, and for reality itself - each transitory moment is a dharma.
Reality is light - insubstantial, boundaryless.
The teaching is no fixed set of belief or doctrine, just the realization of each moment's impermanence. Trust this reality, don't trust nothing else. Don't look for something permanent or separate to shield you from life's suffering. Each moment, impermanent, empty, life as it in fact is, the only teacher.