It is stated in the scriptures that ripening of the cause comes in four types. The first is the one that ripens in the same lifetime. For example, karma was committed in youth and the effect takes place in middle or old age. Sometimes karma ripens even sooner, and the effect can be seen immediately. The reason is that certain conditions can expedite the manifestation of fruit. Such fast ripening has something to do with the object and the motivation of the action. There are many such cases told in One Hundred Stories about Karma (Karmasakata). For example, the Sangha and ordinary people are two completely different objects. If it is a serious case of stealing from or slandering the Sangha, the retribution may come right away or in this lifetime. If the same act is committed against ordinary people, one will surely bear the consequence but not necessarily right away or in this lifetime. The different results arise from the difference between the two objects. The other condition is the difference in motivation. If the intention to kill is very strong or has been premeditated for a long time, the retribution will come swiftly, whereas the effect may not be immediately apparent if the motivation to kill is not so fierce.

The second is the effect of committing great evil, such as the five hellish deeds, or great virtue will definitely materialize in the next life.The third effect is certain to manifest but the timing of which is uncertain; it may take three or four lifetimes or even longer. The fourth, there may or may not be any effect. What could be the reason for this uncertainty in view of infallible karma? When a weak cause (or karma) encounters a strong antidote, causality may then be broken.

The first three types of karma, that is, the one that ripens in this and next life, and with uncertain timing, are immutable karma. The fourth, with indefinite fruition, is mutable karma.

During the time of the Buddha, there were many non-Buddhist practitioners in India who, with their clairvoyance, saw lifelong virtuous people find rebirth in the hell, hungry ghost, or animal realm instead. They questioned, “If cause and effect was truly infallible, why would virtuous people not end up well?” Hence, they viewed the idea of cause and effect as pure nonsense.

How can a person who has practiced virtue the entire life be reborn in the lower realms? Well, although the person may have been virtuous throughout this life, we do not know anything about this person’s previous lives. Maybe the person has been virtuous in this as well as the last two lifetimes, but it may not be so anymore if we could go back even further. Some negative karma might have been committed many lifetimes ago. From the perspective of the three types of immutable karma, virtuous karma that the person has committed in this life happens to ripen not in the current or the next life, but in the yet known future lives. That is, it may not come to fruition until perhaps hundreds or even thousands of years later.

In our innumerable past lives, had we ever committed this type of immutable karma? The answer is yes. Therefore, we can be as virtuous as we would like in this life, retribution may still await us if we cannot purify all our negative karma of the past. Once this type of karma matures, there is no escape but to bear its effect albeit temporarily. Does this mean that virtuous karma we have accumulated in this lifetime will go to waste? It certainly won’t. They also bear their own fruit. However, if virtuous karma is not powerful enough and ripens slowly, it is possible that we may have to suffer first before enjoying any reward.