Evocation vs. Invocation
These are common 'buzzwords' that one may encounter when it comes to the Craft, but there is a clear distinction between them. To invoke means to call for the presence of a deity or energy of positive influence, perhaps to guard and strengthen a ritual or spell working. To evoke, on the other hand, means to call upon and draw from the energy within oneself.
For example...
Evocation of the Witch
I am one with the universe,
I am no-thing and I am everything.
I am the stars and the moon
the seas and the storms
the breath of life
the alchemical change
the living and the dead
I am!
I am the power and the joy.
I am the spirit that dances.
I am the magick and the priest
the witch and the sorceress
the angels and the elements
omnipotent
omnipresent
I am!
I am the past, the present and the future,
I am the void
and I am the manifestation of my desire.
I am!
Invocation of the Goddess
I call thee down, O my great Queen
to enter my body
and commune with my spirit.
Be with me now as I fulfill my destiny
and work magick
in accordance with your will.
So mote it be!