Although all art requires active involvement, Holocaust art is especially demanding. Memory is a crucial catalyst in this process. The lack of human figures in most of Bak's forsaken landscapes will be a mystery only to those who ignore the incandescent shimmer that so often ripples through their atmosphere, or the sinister smokestacks that rise like accusing fingers from a barren terrain. An unholy glow is all that lingers from millions of bodies consumed by fire. Among other possibilities, these paintings are dramatic bulwarks against amnesia. They are reminders of a sacred past, criminally besieged, crowded with emblems of a ravaged civilization. They contain fragments of a giant jigsaw puzzle called Creation that burden viewers with the task of retrieving its missing pieces, while leaving them wondering whether those pieces may not have been lost forever.