This is the dictionary definition of Infinite:

1. Having no boundaries or limits.
2. Immeasurably great or large; boundless: infinite patience; a discovery of infinite importance.
3. Mathematics.
   1. Existing beyond or being greater than any arbitrarily large value.
   2. Unlimited in spatial extent: a line of infinite length.
   3. Of or relating to a set capable of being put into one-to-one correspondence with a proper subset of itself.

In metaphysics, we are interested only in the first definition. The second in only a figurative use of the word and is of absolutely no interest. Mathematicians use the word only in a specialized and technical sense – in comparing it to the first definition, it is obvious that the mathematical infinity is not the metaphysical infinity, so care must be taken never to confuse the two.

The first thing to note is that the Infinite is necessarily one, indivisible, eternal, and unchanging.

There cannot be two infinities because Infinity A would limit or set a boundary to Infinity B. Therefore, the Infinite is One.

If the Infinite were divisible, it could either be divided into two finite parts, which is impossible, or it could be divided into two equally infinite parts, which is also impossible. Thus, the infinite is indivisible.

It is eternal, otherwise it would be limited or bounded by time.

Suppose the Infinite could change from state A to B. That means that the Infinite as B would limit the Infinite as A. By definition this cannot be, therefore the Infinite is unchanging and cannot evolve.