Karma in its broadest sense, means what you sow is what you reap or what you give is what you receive. It is the law of cause and effect in every aspect of life, as applied to individual, family, or a nation.
For the same measure that ye mete withal it shall be measured to you again- Luke6:38 (Bible)
Just as a farmer plants a certain kind of seed and gets a certain crop, so it is with good and bad deeds- Mahabharata
Thou shalt receive requital and reward in just return for whatsoever thou dost- Koran
The law of Karma is unbreakable whether we accept it or not it is existing. We can never claim that we are experiencing bad effects without reasons, we may be good persons in this life, but we are ignorant of the deeds we did in the past lifes. Do not do unto others what you would not have them do unto you. If you do not want to be cheated, then treat others honestly and fairly. If you have worked out most of your negative karma and have not done anybody any harm, then you have nothing to fear anymore.
How to Neutralize negative Karma
Do spiritual practices like meditation, Mantra japa and Prayer. Meditate and try to learnt the lesson that is to be learned from that particular effect and make
firm resolution to do right thing.
Pray for the mercy and forgiveness of god or SatGuru. Show mercy to all
Give ten percent of your income to charity for your rest of life.
Forgive others, you will be forgiven. Do not hate anyone even if one hurts you.
Hating anyone will certainly harm yourself. Mentally visualize forgiving your enemies even if you are in a stage to physically friendly with them. Repeat this whole things as long as necessary and as long as one feels an inner feeling of mercy anf forgiveness.
Principle behind the Law
The law of Karma is based on the Principle of ‘Spiritual oneness’, whatever a person does to others he does to himself.
Spiritually, the cause set within the inner world will inevitably materialize physically unless a neutralizing factor(positive karma) is set in motion.
This is called the Law of Karma.
By killing or hurting other people, one is doing it to oneself many many times. The negative karma effect will inevitably manifest.
By giving and sharing generously one will be blessed with great abundance and prosperity. By giving and sharing, one is actually giving to oneself many many times.
This positive karma will inevitably manifest. May be you reject these words as nonsense, but understand that universal laws exists whether you believe or not.
For example we all know Law of Gravity exists, If you fall from a height, whether you are a good person or bad person, you hit the ground.
This is the meaning of the statements “Dharmo rakshati rakshita- Dharma protects those who protects it” & “My righteousness is my shield”.