Ideas with strong emotional content almost always reach the subconscious mind. Emotion surrounds information. The mind and the nervous system respond only to mental images. The mental image formed becomes the blueprint and the subconscious always tries to follow the blueprint. Expectations tend to become a self-fulfilling prophecies.
Any idea accompanied by strong emotional content is difficult to modify with reason.
You cannot love and hate someone at the same time, for example. Once an idea is fixed, it tends to remain fixed. This is how habits are fonned, both good and bad. The subconscious has a powerful effect on our physical being. Thus suggestions should begin simply and become increasingly complex for the mind to follow.