subconscious beliefs?

Hi – just wondering if you think that we have subconscious beliefs/thoughts? the definition I am referring to is: beliefs/thoughts which one is not fully aware of but influences one’s actions (and feelings). Meaning these beliefs/thoughts aren’t necessarily accessible to us in order to be aware of them, model, change, etc?

If we have these subconscious beliefs/thought and we don’t even know what they are — how do we access them?