In Interpretation of Dreams, Freud believed that dreams played a leading role in spiritual activities. Spiritual energy, which Freud called libido, mainly refers to sexual desire. It is an unfixed and plastic force, but it will become a troubled force because of excess. This power must be released to get happiness and prevent pain, so it must find all possible exits. If it cannot be satisfied through direct action, Libido will seek release through spiritual channels. Or in the language of "dream interpretation", this desire can be satisfied by realizing it in imagination. Freud declared that all dreams, even nightmares with anxiety, are the means to satisfy this desire.
Interpretation of Dreams is really a good book, although Lloyd linked dreams with sexual instinct.
Get up in the morning and try to recall last night's dream, and then analyze it according to the source analysis method of the dream. It really has roots! Whatever it is.