The public health situation in Greece is precarious, as in Germany. But it is still possible, it seems, to hold retreats (albeit with strong social-distancing measures).
This is exactly why we rely on silent meditation: nothing, with words, relying on words, coming from words, needing words can ever come as close to delivering an experience of truth. Philosophy aspires to truth: but it cannot reach there, fully. It is why Dae Soen Sa Nim used to say, “Opening your mouth is already a big mistake.”