Karma : You can run but you can’t Hide

“Countless rebirths lie ahead, both good and bad. The effects of karma (actions) are inevitable, and in previous lifetimes we have accumulated negative karma which will inevitably have its fruition in this or future lives. Just as someone witnessed by police in a criminal act will eventually be caught and punished, so we too must face the consequences of faulty actions we have committed in the past, there is no way to be at ease; we must eventually undergo their effects."
-His Holiness the Dalai Lama-

The Sanskrit word Karma literally means action. In Buddhism however, karma mainly refers to one's intention or motivation while doing an action.

The shortest possible explanation of karma is that what goes around comes around someday, somewhere, so whatever you so do intentionally to others, will definitely come back to you, not necessarily in this birth but in some future birth.

Even science has proven this primary teaching of Buddhism.

Isaac Newtons 3rd Law – “Every action has a Reaction”, this point was the basic teaching in Buddhism as karma which scientists took thousands of years to understand.

The 're-actions' or results of our actions show up with a time delay, and it becomes extremely hard to tell which action caused which result.

I even got to know through the website “viewonbuddhism.org” that the bible has also extracted teachings from Buddhism.

Do not be deceived: God cannot be mocked. A person reaps what he sows.
(Gal. 6:7)
All things whatsoever you would that men should do to you,
do even so to them: for this is the law and the prophets.
(Matthew 7:12)

Remember, your future is within your own hands. Since action is a phenomenon that is committed by a person, it is within your own hands whether or not you engage in action.

When we meet with big problems; disease, loss of family or friends, getting trapped in a war or natural disaster. At those times, we suddenly wonder: "Why me?" The law of karma does not look for a reason outside ourselves for our good or bad fortune, it simply explains our own suffering as a result of our negative deeds that we have done towards others, and also our happiness as a result of our actions to help others.

As the Buddha taught:
"Do not think a small sin will not return in your future lives.
Just as falling drops of water will fill a large container,
The little sins that steadfast accumulate will completely overwhelm you”