To dream of diving in water represents the choice to face uncertainty or negativity head on. Confidently choosing to confront problems directly. You may be putting aside obligations or responsibilities to deal with a problem with full strength. “Taking the plunge” in a situation.
To dream of into anything besides water represents full focus on a situation. Wanting to immerse yourself completely with something. Getting “head deep” into a problem or something you love. Confidently exploring an issue.
Diving in a dream may also reflect your wish to show others that you fear nothing or how serious you are about doing something.
Example: A man dreamed of being about to into water. In waking life he was prepared to make a more serious commitment in a relationship of which he worried about taking.