Karma is actually a belief that originated from buddhism. The Bible says nothing about the rationality of this concept. However, it does talk about doing unto others as you would want them to do unto you (the golden rule). The Bible doesn't say that if you do something bad, something bad will be done to you by another. It says that in the end God will judge you and his judgement is superior over all else.

Actually the Bible does have a Karma-like concept. 'Whatsoever a man soweth, that shall he also reap.' -Book of Galatians

Yes, but it uses different words, such as "merit."

It depends on what you mean by karma. Do you mean the Hindu-Buddhist terminology or the popular western meaning? Hindus/Buddhists believe that karma is the sum of all the "good" and "bad" deeds in a human's life, which determines whether the person will be born into a higher caste in the next life (in Hinduism) or will either get nearer to or further from Nirvana in the next life (for Buddhists). If this is what you mean, then no. The Bible does not teach this, as the Judeo-Christian belief system is quite different. Firstly, in J-C belief, time is linear (straight, with a beginning and and an end) as opposed to cyclical in H/B. Therefore, by JC belief, humans have only one life before they face God for judgement. Salvation, in J-C teaching, is not by works/ deeds but by faith (Genesis 15:6 Abraham believed God, and it was counted to him as righteousness; quoted by Paul in the NT Galatians 3:6; Romans 4;3). However, if you take karma to mean, as many westerners do, "you do this and this happens as a result", then there is a case for this in J-C teaching. IN the New testament we read, "For whatever a man is sowing, this he will also reap." Gal.6.7 HOwever, before we take this as a yes, the verse must be looked at in context: Brothers, even if a person is caught in some transgression, you who are spiritual should correct that one in a gentle spirit, looking to yourself, so that you also may not be tempted. 2 Bear one another's burdens, and so you will fulfill the law of Christ. 2 3 For if anyone thinks he is something when he is nothing, he is deluding himself. 4 3 Each one must examine his own work, and then he will have reason to boast with regard to himself alone, and not with regard to someone else; 5 for each will bear his own load. 6 One who is being instructed in the word should share all good things with his instructor. 4 7 Make no mistake: God is not mocked, for a person will reap only what he sows, 8 because the one who sows for his flesh will reap corruption from the flesh, but the one who sows for the spirit will reap eternal life from the spirit. 9 Let us not grow tired of doing good, for in due time we shall reap our harvest, if we do not give up. 10 So then, while we have the opportunity, let us do good to all, but especially to those who belong to the family of the faith. ======== Firstly, Paul is not talking about salvation. The people he is addressing are Christians already. He is talking about their lifestyle. Is it glorifying God or are they taking their salvation lightly. After all, salvation is a good example of NOT getting what we deserve. We deserve to be abandoned by God (sent to hell), but, because of the sacrificial death of Jesus on the cross, our sins are paid for and we can be friends with God. We don't deserve that privilege, but if we trust in Jesus, he earns it for us. Therefore, Paul says, be careful how you live in the light of this great privilege. If you live a life that glorifies God, then that is good. But if you don't, remember that there are consequences. Spiritual ones. You put your salvation in danger, because God is not mocked. He doesn't like people who boast about being His people, and then live like they aren't. The key verse for the Christians addressed here is "Let us not grow tired of doing good, for in due time we shall reap our harvest, if we do not give up" Hope this answers the question. Cheers.

Karma is the basis of our living and the Bible is filled with it.But the main thrust of the Bible is not Karma yoga but of Bhakti Yoga which means 'the path of devotion'.