What did Freud believe was the reason for determining thoughts and actions?

When we’re talking about Freud, if the answer has the word “unconscious” in it, it’s most likely correct. In this case, the answer we want is “forces in the personality that are often unconscious.” Freud believed that we had two different parts to our psyche: the conscious and the unconscious. The conscious mind made up something like 10 or 15 percent of our personality, which is what was shown.

The rest of it was the unconscious. It was something that was too horrible to be shown in reality so it was masked and hidden away, even though every now and then, slips of consciousness would allow it to surface. These made nightmares, sexual drives, everything a little easier to understand. It all came back to sex, but Freud was the first person to make it all make sense.