Actions come from thoughts: No action (Karma) can ever be performed unless we think of, or want it to happen at some level of mind. 

Habit patterns define personality: Our personalities have been woven by our habit patterns (Samskaras and Karma), and our habit patterns are the result of our repetitive actions. If we look at ourselves closely, we will realize that our habits really are our personality. In a sense, we become our Karma, while at the same time the true Self resides there, underneath, all along. 

Emotions control thoughts, which control actions: The real motivation for actions (Karma) is our thoughts. All of our actions are controlled by our thoughts, and all our thoughts are controlled by our emotions. Compared with our emotions, thought has little power.