On my trip to Boston, shadow work, manifesting, and stranger angels everywhere.
The big block to hearing the voices of Spirit is listening for what you think you're SUPPOSED to hear.
You can request that your angels and guides maintain a psychic security perimeter around you, similar to that which the Secret Service provides the President.
For the record, the angels I've seen do not look like Barbies with wings.
There are spirits who manifest physical bodies that absolutely anyone can see, even those who are not psychic.