Buddha misses all beings, like a mother misses her son. What will his son remember if he runs away? If all living beings don't believe in Buddhism and don't believe in the compassion and willingness of all Buddhas, it means that the Buddha is remembering all living beings and all living beings can't feel the benefits brought by Buddha and Bodhisattva.
If a child remembers his mother, just as his mother remembers his time, it is not far away. If all sentient beings can truly believe in Buddhism and abide by Buddhist precepts, they will certainly be able to communicate with Buddhas and Bodhisattvas and get great relief from their troubles and pains.