Opening up yourself and letting out all the accumulated knowledge and experience stored within.
Getting past a tough barrier to gain something with substantial sustenance. This includes breaching any obstacles you’ve placed between yourself and the world, or those behind which other people hide (see Armor).... The Language of Dreams
Finding a can opener may represent that you have discovered an important tool for cpening up someone to your way ol thinking. Difficulty in opening a can may comment on difficulties in discovering the right ingredients to living a fulfilled life, or that you feel frustrated, or that you are unable to open up to someone else.
The act of opening something symbolizes the arrival of a new influence in your lives. Perhaps, you will feel very inspired or have new ideas. Depending on the context, it may symbolize an open door that offers the possibility of entering, leaving, or changing a given situation. It could express: leaving confinement, entering into a desired situation, or leaving behind pleasant things and people. In this sense, it is also good to ask yourself if you are truly influenced by the spiritual or, if you always opt for the easy way out.
If it is a door opening, it tells you your enemies will slander you.... The Big Dictionary of Dreams