As a Wiccan, you are entirely free to honor Thor if you wish.
I would not wear the Thor's hammer if you don't honor the deity;
but if you do honor him, then go ahead and wear it.
Don't let people in other religions impose their rules on you.
They seem not to understand that Wicca has its own rules.
One is that Wiccan theology allows for us to honor a diverse
assortment of deities, either as aspects of our Great Goddess
and our Great Horned God, or else as independent deities
in their own right.
Blessed Be!
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ADD / to the person posting directly below me:
Wicca is NOT "the same as paganism."
Wicca is one unique pagan religion among many,
with its own theology, philosophy, history, etc.
Asatru is another unique pagan religion.
Like other recently "reconstructed" pagan religions,
Asatru is just as much a part of the Neopagan
movement as Wicca is. Because there is no way
to reconstruct exactly what the ancient pagan religions
were doing. Not even in the case of Greece and Rome,
for which there is the most evidence left behind.
Even less so for Celtic and Norse religion.
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ADD / to April:
NO, it is not true that there are "no rules in Wicca"
and that you can do whatever you want, and it will
still be Wicca. Wicca is a theistic religion, and as
such the core of the religion is in the theology.
Wicca worships, above all, two supreme deities:
the Great Goddess of the Moon and stars, and
the Great Horned God of the wilderness and
the realm of Shadows beyond death. Each of
our two supreme deities has many aspects;
some of those aspects can be related to various
pagan deities around the world; such as Pan,
Herne, Bacchus, etc. But NOT ALL deities from
all over the world are aspects of the Wiccan God
and Goddess. Wiccan theology revolves around
the idea of gender polarity; so some aspects are
considered to be of the Goddess, while others are
considered to be of the God.
For example: In Wicca, one of the strongest and
most ancient associations is that of the Goddess
with the Moon, and the God with the Sun. But if
someone follows Asatru, then that religion reverses
that gender polarity; they honor a male moon god
and a female sun goddess. So that part of Asatru
does NOT fit with Wicca, not at all.
Please learn more about traditional Wiccan theology,
so that you don't go around misrepresenting Wicca,
or feeding unfortunate misconceptions such as
"there are no rules in Wicca."
I suggest that the books of either Doreen Valiente
or Gerald Gardner would be a good place to start,
since the two of them together were the most important
formative influences in shaping contemporary Wicca.
Valiente's books are an easier read, and better to
start off with, I would say. (And Gardner's claims
of history need to be taken with a grain of salt.)
Other good books on traditional Wicca are
available through Capal-Bann publishers.
In particular, there is a very lovely and succinct
outline of traditional Wiccan belief in Valiente's
verse, titled "The Witches' Creed." It contains
the core of our theology and ritual practice.
Very bare bones, but enough to show that we
do indeed have a basic doctrinal belief system
in Wicca. It's not just "whatever you feel like."
If someone wants to practice witchcraft and
"do whatever they feel like" then they can well
go and do that as a neopagan witch. But that
is not the same thing as Wicca.
---
To clarify the theology a bit more:
Wicca is primarily duotheistic, with the
God and Goddess as divine lovers at
the heart of our religion. But many Wiccans
are also polytheistic. It's not an either/or thing.
One way to look at it is to say that we worship
our two supreme deities; while we honor many
other deities as well. So it's true that a Wiccan
is free to honor other gods such as Thor or Anubis
or Apollo or Ganesha. But that does not mean
that every pagan ritual you do is a Wiccan ritual.
If the main deities honored are the Wiccan God
and Goddess, then that's probably a Wiccan rite.
But if your ritual is centered around some other
deity, then it's not a Wiccan ritual. That's fine,
you can honor other Gods if you wish. Our
Gods in Wicca are not "jealous gods."
But if you find yourself putting some other deity
or deities at the top of your own personal pantheon,
instead of the Wiccan God and Goddess, then you
need to take a step back and ask yourself whether
you're really Wiccan, or a generic neopagan.
Also, don't go substituting other, unrelated or
inappropriate gods for our Lord and Lady when
you do Wiccan rituals. Ganesha or the Buddha
are NOT aspects of the Horned God; nor is Apollo.
If you decide that you want to worship Jesus and
the Virgin Mary as your God and Goddess, then
don't put them on a Wiccan altar, because they
cannot be the Wiccan God and Goddess.
(For many reasons, including the essential one
that they are not heterosexual lovers. But even
Jesus and Mary Magdalene don't fit into Wicca;
because Jesus is NOT the Horned God. Right?)
People who want to be "Wiccan" while not letting
go of their Jesuses are neither Wiccan nor Christian.
They're inventing their own new religion, which is
not Wicca.
.