When Ketu works through lower principle, it signifies the mafia world, mystic activities,
unfortunate person or event, wounds, suffering, misery, poisons, scandals, skin
diseases, scavengers, parasites, strong noxious smells, homeless, destitute, bad
company, infections, false pride, selfishness, secret intrigues and associations,
habit of backbiting, bankruptcy, madness, spying activity, etc.
When Ketu works through higher principle, it signifies moksha(final emancipation
from the life-death cycle), spiritual initiation, practice of yoga, sudden gain,
renunciation, deep space exploration, place of religious and occult significance,
artistic taste, literary genius, philosophical outlook, etc