I Am And IT IS

Anyone know who It Is, where It Is, or how It Is?

I think therefore I am, but It Is a mystery to what causes me to think. I am is looking for what It Is.

Definition of I
-the one who is speaking or writing

Definition of AM
-present 1st singular of be

Definition of IS
present 3d singular of be
dialect present 1st & 2d singular of be
dialect present plural of be

Definition of BE
a : to have an objective existence : have reality or actuality : live <I think, therefore I am>
b : to have, maintain, or occupy a place, situation, or position <the book is on the table>
c : to remain unmolested, undisturbed, or uninterrupted —used only in infinitive form <let him be>
d : to take place : occur <the concert was last night>
e : to come or go <has already been and gone> <has never been to the circus>
f archaic : belong, befall

Definition of IT
1: that one —used as subject or direct object or indirect object of a verb or object of a preposition usually in reference to a lifeless thing <took a quick look at the house and noticed it was very old>, a plant <there is a rosebush near the fence and it is now blooming>, a person or animal whose sex is unknown or disregarded <don't know who it is>, a group of individuals or things, or an abstract entity <beauty is everywhere and it is a source of joy> — compare he, its, she, they
2
—used as subject of an impersonal verb that expresses a condition or action without reference to an agent <it is raining>
3
a —used as anticipatory subject or object of a verb <it is necessary to repeat the whole thing> ; often used to shift emphasis to a part of a statement other than the subject <it was in this city that the treaty was signed>
b —used with many verbs as a direct object with little or no meaning <footed it back to camp>
4
—used to refer to an explicit or implicit state of affairs or circumstances <how is it going>
5
: a crucial or climactic point <this is it>