While all classic texts on Hindu astrology narrate in general the dasha-effects of planets on the health, wealth, happiness, activity, age and the general well-being of human beings on the premise that all events have the tendency to re-occur, the overall effects of the Vimshottari mahadashas of nine planets are subject to the effects of their respective antra-dashas and paryantra-dashas that depend largely on their location as counted from the mahadasa-lord and their natural and temporal relationship with it. The author of
Sarvartha Chintamani has remarked that the ancient seers did not approve any other method for assessment of one's lifespan etc.; other than through the aid of the yogas obtaining at the time of birth and the nature of the dashas likely to operate. The twelve signs, their divisions and sub-divisions, the twenty-seven nakshatras and their divisions, and the nine planets by their simple as well as complex combinations, associations and permutations form thousands of yogas and ava-yogas. Planets in signs with the hind parts rising may show their full effect in the latter part of the mahadasa; in the signs rising with the front part first, in the initial period, and in Pisces, in the middle. Gopesh Kumar Ojha states that the art of interpretation varies from circumstance to circumstance and with the subjective appreciation of the astrologer. General effects of mahadashas. • Ketu – 7 years. If Ketu is favourably placed one devotes time and energy to the perusal of philosophy texts and engages in worship, derives much income from practice of medicine, enjoys domestic comforts and luxuries, good luck and freedom from disease. But if Ketu is ill-placed one may suffer intense pain of body and anguish of mind, accidents, wounds and fever, have low company and suffer bad consequences through them. • Venus – 20 years. If Venus is strong and favourably placed one may acquire things of art and pleasure, co-operates with others reciprocally in an harmonious manner and gains, falls in love, gets married, love and affection for spouse increases, begets daughters, rise due to the patronage or favour of some lady and well-wishers. But if Venus is weak and afflicted one suffers from ill-health, contracts urinary or venereal diseases, low sexual prowess, monetary loss, lack of favours and support, disharmony at home and outside and earns a bad name. • Sun – 6 years. If the Sun is strong and favourably placed the soul will feel strong, one may make efforts for self-realisation, live splendidly, travel far and wide, engage in strife or hostility that yields good dividend, rise in position and status, gains through trading, and benefits from father or father will benefit. If the Sun is weak and afflicted one may feel inner weakness, suffer decline in physical and mental prowess, health troubles, demotion in rank and status, displeasure of the government, trading losses and suffer at the hands of father or his father may suffer ill-health or die. • Moon – 10 years. If the Moon is strong and favourably placed one may have a cheerful heart, a happy and a vigorous mind, facial lustre increases, enjoys subtle pleasures and comforts, obtains a good job or rise in status, gains money and favours and pays homage to gods. If the Moon is weak and afflicted one suffers from ill-health, lethargy and indolence, loss of job or demotion, loss from or quarrel with women and mother may fall ill or die. • Mars – 7 years. If Mars is strong and favourably placed one may gain from or through brothers, earn favour from persons wielding authority, enter into or promotion in military, para-military or police service, acquires landed property and other valuables, enjoys good health, exhibits optimism, daring and persistence. If Mars is weak and afflicted one may suffer from fall, wounds, deterioration of blood, at the hands of a magistrate, become quarrelsome, exchanges hot words, earns enmities, hates and litigates. • Rahu – 18 years. If Rahu is favourable one may gain ruling powers or rise in governmental favours by resorting to falsehoods, tricks and cunning, earn and gain wealth through unscrupulous means, changes place of residence. But if Rahu is unfavourable one suffers very many losses, suffers from snake-bite, aberration of the mind, hallucinations and illusions, asthma, eczema etc. It is the worst mahadasha for education or career which may be broken or disrupted. • Jupiter – 16 years. If Jupiter is strong, well-placed and forms good yogas one is inclined to learning and increase of knowledge; if it comes in middle age it confers wealth and bestows sons, one leads a comfortable life, one goes on pilgrimage and has auspicious celebrations, and in old age bestows, better income and finances. If Jupiter is weak and afflicted one gives up education, suffers from failures, poverty and many miseries including fall from position and ill-health, commits evil deeds, becomes frustrated, sons or grandsons may also suffer. • Saturn – 19 years. If Saturn is favourable one rises in service by own strenuous efforts and hard work, derives benefits from things signified by Saturn and gains a legacy. But if Saturn is unfavourable one may suffer from diseases due to malnutrition, poverty, litigation etc.; quarrels and disputes with elders, deaths in the family or of near ones, impediments and obstacles in path of progress and miserable life due to distress all around. • Mercury – 17 years. If Mercury is strong and favourable one devotes time and energy to studies, writing etc.; remains active, engages in commerce or politics or diplomacy, gains through dealings with others and trade, enjoys company of friends, peace and tranquillity and lives in comfortable surroundings. But if Mercury is weak and afflicted one may suffer from nervous disease, a bad liver, loss due to bad friends and relations, due to own dishonesty and of others, defamation and the like. ==Antar-dasha or Bhukti==