If we travelled by rocket for a great length of time, we would only cover a short distance compared to the extent of three thousand great thousand world systems. Although those world systems are big, they are created from motes of fine dust. The largest things are created from the smallest. Although one mote of dust is small, many of them together become a great thousand world system. In the same way, the merit and virtue we do comes from small deeds. By doing many good deeds we become adorned with ten thousand virtues. You should not think you need not bother doing small good deeds or that you can get away with doing small bad ones. Many seemingly inconsequential good deeds will accumulate into great goodness. Although you may only do minor bad deeds, many will accumulate into great evil. In just the same way, a whole world comes from a collection of small dust motes.