I am sure I can speak for everyone that has endured decades of being an evertonian.
To fully understand what it is like you should start by watching the holy grail of Dramas. A 1968 ken loach drama titled "A golden vision" there are some links to it on this site, latest one being under the title of "memories" in the ale house.
Basically, whilst watching a season you will experience all feelings known to man and woman kind respectively. You will be lifted to your ultimate heights and dropped lower than you could think possible within any 90 minute stretch. Yet at these times the unique thing about being an Evertonian is you will never be alone. You will always have the pride, the joy, the history and most of all your fellow Evertonians. Lifting you up, Carrying you when you are high, Catching you when you fall. And always knowing what, why, where and how you are feeling.
This is how I feel about the club and my friends that support with me. I hope this helps a bit.