
The picture above illustrates the Sephirotic Tree of Life. The shell of Sephira Chesed is called Gamchicoth. The Princes and Prelates of Goetia come from Gamchicoth. This Qlipha (the shell) is ruled by the planet Jupiter.

But according to the Goetia, Astaroth is the Duke of Qlipha Harab Serapel. This Qlipha is ruled by the planet Venus and most of the Goetic spirits come from this place on the Qliphotic Tree. We shall stick to the classification of spirits according to the Goetia.
So, now, lets take a look at the Princes and Prelates of the Goetia. They are summoned during Thursdays, because the planet Jupiter rules the Thursdays.
Also, it would be great if you can summon the Princes and Prelates of the Goetia during the astrological hour of Jupiter.
I use the correspondences of Chesed even for Gamchicoth:
Ruling planet: Jupiter
Day: Thursday
Astro hour: Jupiter
Paper seal colour: blue
Metal: tin
Gems: sapphire & amethyst
Number: 4 (4 candles for example)
Plant: olive (use olive oil)
Scent: cedar (I use cinnamon)
The best day for magick together with the Princes and Prelates of Goetia is Thursday. Select the astrological hour of Jupiter if you want to fine tune your magick.
Vassago

Vassago is of a good nature and he can tell you about things of the past, and also predict your future. He can also discover secrets, things hidden and lost.
If you suspect that your enemy has cursed you, then you might want to summon Vassago, because he will tell you the truth. This spirits can also give you advice when you are dealing with difficult people.
Source:
Goetia & Daemonolatry Goetia by S. Connolly
Sitri

Sitri can inflame men with women’s love, and women with men’s love. This spirit causes a man and a woman to desire each other with great passion.
According to S. Connolly, Sitri can do all the above stated for you, and he can also be called upon when you wish to infuse a creative project with passion.
Source:
Goetia & Daemonolatry Goetia by S. Connolly
Ipos

Ipos knows everything about the past, present and future. He will make you brave and more decisive. Ipos can help you to end the confusion and bring emotions under control.
Source:
Goetia & Daemonolatry Goetia by S. Connolly
Gäap

Gäap can help you with your studies of philosophy and all sciences. Gäap can tell you all you want to know about the past, present and future.
He can cause love or hatred. Besides all this, Gäap can teach you special magickal rituals and he can also deliver to you Familiar servants owned by other practitioners of magick. He enhances your own magick while making the powers of others inert.
Source:
Goetia & Daemonolatry Goetia by S. Connolly
Stolas

Stolas can teach you magick, astronomy, all natural sciences, and also the properties of gems and herbs for use in spells.
Source:
Goetia & Daemonolatry Goetia by S. Connolly
Orobas

Orobas can discover all you want to know about the past, present and future. He gives dignities, prelacies and the favour of friends and enemies. He is a good natured spirit.
According to S. Connolly you can summon Orobas for bindings and to change people’s opinion.
Source:
Goetia & Daemonolatry Goetia by S. Connolly
Seere

Seere brings things suddenly and fast to you. He can tell you the truth about any kind of theft and of treasure hid, and of many other such things. He is willing to do anything you ask him to do.
Source: Goetia
Check out these posts about the Demons of Goetia:
The Earls of Goetia and how they can help you
The Marquises of Goetia and how they can help you
The Dukes of Goetia and how they can help you
The Kings of Goetia and how they can help you
The Presidents of Goetia and how they can help you
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