From the same tree, some leaves may be carried to a cesspool by wind, while some may fall in a garden; the destination of each leaf seems accidental, but is in fact driven by their individual causes and conditions. Similarly, under the same circumstance, some people may make a sudden fortune, while some become destitute; it seems that various accidents keep happening in our life, but what is behind it is a profound force, which is called karma.

-- Khenpo Sodargye Rinpoche