All it takes to be a Mystic is to be willing to take mental risks for a chance at greater understanding;
All it takes to be a Mystic is to delve into the Void, come back with some new thing and share that thing with the World;
All it takes to be a Mystic is to be sensitive to one's own Path reminding others of theirs;
All it takes to be a Mystic is to not be afraid to defy your Time, peers and Culture to bring forth the Divinity inherent in everything;
All it takes to be a Mystic is not not be deterred by what you are told, but instead to be guided by what you feel truest in yourself;
All it takes to be a Mystic is to be able to interpret and take things symbolically, Mythos and Logos, synesthetically creating a new mutual Reality;
All it takes to be a Mystic is to be willing and able to be a Prism for the Divine; to purify the Mirror of your being;
All it takes to be a Mystic is to be Artistic; Creative and Imaginative, not that the Mystic must be an Artist, or that any Artist is a Mystic, but that the Mystic is most naturally expressed through the various Artistic mediums;
To be an example for the masses of just how the many are One as One is truly the many and thus All is Divine:
How the Universe itself and all it's inhabitants are the expressions reflections and manifestations of the Godself; An illusion, A Dream: Godself and self is One. -- All is a Chapel of Sacred Mirrors divided by Mind into Self and Other, but all is truly Godself: Collective Unconscious and Personal Conscious, Brahman and Δtman, Godself and Self; One in the same.
Tat tvam asi.
All it takes to be a Mystic is to be willing and able to look inward and learn: