Karma operates through causation and conditioning, not through a permanent soul carrying consequences—actions condition future experience directly.
The Buddha taught that there is no eternal, unchanging soul (what Buddhists call anatta or anatman). Yet he clearly taught that actions produce results. This appears contradictory only if we assume karma requires something permanent to "carry" its effects from one moment to the next, or from one life to another. The Buddha rejected this assumption entirely.
Instead, he taught that karma works through immediate and ongoing causation. When you perform an action—physical, verbal, or mental—it conditions the mind in the present moment, shaping your character, habits, and perception. It also sets in motion causal chains that produce results in the world. There is no need for a soul to experience these results; the results arise naturally from the conditions created by the action itself.
Think of karma not as punishment or reward administered by a cosmic judge, but as natural consequence. If you cultivate anger, your mind becomes prone to anger; you interpret situations as threatening; others respond defensively to your hostility. The result is a painful mental and social environment. No soul-substance was required to make this happen. The conditioning of the mind is the karma; the resulting suffering is its natural fruit.
In the Dhammapada, the Buddha says, "If a person makes himself as good as he makes himself, who can hinder him?" This emphasizes self-causation: your actions shape who you become. The Samyutta Nikaya contains the teaching that karma (literally "action") is intention. Intention conditions the mind, creates habits, and influences how you perceive and act in the world. This happens automatically, without need for an eternal experiencer.
The puzzle becomes sharper when considering rebirth across multiple lives. If there is no soul, what connects one life to the next? The Buddha's answer is that there is a causal stream, not a soul-substance. One life ends; the force of that life's karma—its accumulated conditioning and unresolved mental patterns—generates the conditions for the next life to arise. It is like a flame passing from one candle to another: no substance transfers, yet there is genuine continuity.
This appears in texts like the Milinda Panha (Questions of King Milinda), where the venerable Nagasena explains that just as one moment of consciousness conditions the next within a single life, so too does the final consciousness of one life condition the first consciousness of the next. The Madhyamaka Buddhist philosopher Candrakirti later refined this: rebirth occurs through the force of karma, not through a karmic container called a soul.
Early Buddhist texts sometimes speak cautiously about this issue. In the Anumana Sutta, the Buddha says that karma is neither entirely determined nor entirely free—a middle path between fatalism and randomness. Actions have weight and momentum, yet new actions can alter trajectories. This is how results occur without a determiner, how consequences arise without a receiver.
Theravada, Mahayana, and Tibetan traditions all accept the no-soul teaching and the reality of karma. Where they differ is in details: some schools emphasize the immediate psychological results of karma; others stress future-life consequences. But none posit a soul. The Dalai Lama has said explicitly that rebirth occurs through karma without a transmigrating self—a continuity without identity.
This teaching has a crucial implication: you are responsible for your actions without needing to believe in a permanent essence. There is no "true self" that could exempt itself from consequences, and no cosmic force outside causation to blame. Your actions shape your experience directly and immediately. This is both sobering and liberating—sobering because you cannot escape responsibility by appealing to a soul or to fate, liberating because change is possible at any moment through new choices.
The Buddha taught karma and no-soul together because they reinforce one another. Without the weight of karma, ethical life has no foundation. Without the absence of soul, you would be trapped within a fixed essence. Together, they support the core Buddhist insight: you suffer because of conditions you can change; freedom is possible through understanding and transforming those conditions.