BLESSING OR CURSING A PERSON AND ITS EFFECTS!
Karma Rules are the Primary laws of God, ie Krishna.
Krishna’s creations are created as a chain network and every living being is controlled by the karma Network.
In this network, our every action is registered and our next birth is determined as per that registry.
(How our curse affects others? How to protect us from the curses of others? READ HERE!)
Actually, there is an equation of balance as per the karma network. A saint or a sanyasi or a devotee or even a pious person would have accrued some good karma or strength of good deeds in his karma account. If someone is destined for earlier death, but, a saint blesses him to have long life, the karma network makes an equation. If the person has to be given a long life violating his karma of short life, he should have some more good karma. So, the karma network deducts some good karma from the account of that saint and transfers it to the blessed person and allows him to live long.
By blessing, a saint or even a good person or devotee may make a person get good things though he is not entitled to get it as per his scheduled karma. So, we have to transfer some of our good and pious deeds to him to to make him get it.
That is why, it is said that the spiritual strength of a person is reduced when he blesses a person violating the scheduled karma.
If he curses a good person, then too, his good karma and spiritual strength gets reduced to some extent because he has accrued the negative karma of an innocent person..
(Why Krishna gives more problems to His devotees, but helping many non devotees? READ HERE!)
By cursing, a saint or a good person or devotee may make a person not getting his due of good things allotted by his karma. So, that saint or good person or devotee may add sin, ie, part of negative karma for spoiling the good fortunes of a good person.
So, the karma rule is that we will lose our spiritual strength if we curse a good person, or blesses a wrong person.
Will the curse of a saint affect the person who was cursed?
If that person does not have more spiritual power than the person who cursed him, he will be affected. This is like an elephant is more powerful a goat.
For example, the sages Vishvamitra, Kashyapa, Vashishta, etc, would have performed penances for many years and have added more spiritual power. If they curse a normal person, say, a boy who is leading material life with or without some spiritual activities now and then, the curse will affect that boy. If the same sages curse the spiritually powerful boy like Prahalada, it will not affect that boy unless he himself accept that curse.
So, if a curse should accept a good person, that person himself should accept that curse. If not, the person who cursed will get negative karma and part of his spiritual power will be reduced from his account.
Lord Krishna too accepted the curse of Gandhari as a token of honouring the wish of his devotee. It shows the mercy of Krishna. Had Krishna not accepted that curse, gandhari would have been affected. Krishna did not want his devotees suffer. So, He accepted it.
Similarly, if a pure woman like Sita devi curses a materialistic person for his offenses, the materialistic person will be affected.
What will happen if the person who was cursed does not get his due of benefits in this birth because of the curse?
That affected person will get his dues in his next birth. If he is a sincere and powerful devotee, he may burn the wrong curse of that saint or devotee and get his dues of good things in this birth itself.
Thus, by blessing wrong person, we lose some of our good karma. By cursing a good person, we acquire some negative karma.
That is why, the Vaidhi Bhakti is recommended. If we follow devotional practices like chanting the Holy names of Krishna and purity in our life, we will be increasing our spiritual power.
When we have increased our spiritual power sufficiently, we can even predict what will happen in future. This is how many spiritual personalities were able to show their divya dhrishti, ie, forcasting the future events.
Purity is the force.
Hope you are clear.