orthodox conversion to judaism

The Shloshah-Asar Ikkarim is included in Maimonides commentary in the Mishnah. It is the 13 Principles of Articles of our Faith.

Ani Maamin.... (I believe....)

1. Belief in the existence of the Creator, be He Blesses, who is perfect in every manner of existence and is the Primary cause of all that exists.
This means that Hashem exists and is complete in all ways and He is the cause of all else that exists. He is what sustains their existence and the existence of all that sustains them. it is inconceivable that he would not exist, for if He would not exist then all else would cease to exist as well, nothing would remain. And if we would imagine that everything other than He would cease to exist, this would not cause the existence of hashem to cease or be diminished. Independence and mastery is to Hashem alone, for He needs nothing else and is sufficient unto himself. he does not need the existence of anything else. All that exists apart from Him, the angels, the universe and all that is within it, all these things are depenent on Him for their existence.
"I am Hashem your G-d..." (Shemos 20:2, Devarim 5:6)

2. The believe in G-d's absolute and unparalleled unity.
To believe that Hashem, who is the cause of all, is one. This does not mean one as in one of a pair nor one like a species nor one as in one object that is made up of many elements nor as a single simple object which is infinitely divisible. Rather, Hashem is a unity unlike any other possible unity.
"Hear Israel! HaShem is our G-d, HaShem is one." (Devarim 6:4)

3. The belief in G-d's noncorporeality, nor that He will be affected by any physical occurrences, such as movement, rest, or dwelling.
To believe that Hashem is not a body and His powers are not physical. The concepts of physical bodies such as movement, rest, or existence in a particular place cannot be applied to Him. Such things cannot be part of His nature nor can they happen to Him.
"For you did not see any form." (Devarim 4:15)

4. The belief in G-d's eternity.
To believe that Hashem was the absolute first and everything else in existence is not first relative to Him.
"That is the abode of G-d the first." (Devarim 33:27)

5. The imperativ to worship Him exclusively and no foreign fals gods.
It is proper to serve Hashem and ascribe greatness to hashem, to make known His greatness, and to fulfill His comandments. We may not do this to any lesser being, whether it be one of the angels, the stars, the celestial spheres, the elements, or anythinf formed from them. For all these things have predetermined natures and have no authority or control over their actions. Rather, such authority and control belongs to Hashem. Similarly, it is not proper to serve them as intermediaries in order that they should bring us closer to Hashem. Rather, to Hashem Himself we must direct our thoughts, and abandon anything else.