Can the Infinite be understood intellectually? Some may say it's impossible. But it is possible to have a limited understanding of the Infinite intellectually. We can understand the Infinite in finite terms, but we can't understand anything in infinite terms - there are no infinite terms. Even the word 'Infinite' uses the term 'finite'. We say it is not finite. It is un-limited. It is un-bounded. It is in-divisible.
Our whole intellectual understanding and knowledge base is founded on finite terms. We use measurements for time, distance, weight, energy etc. These measurements intellectually divide up the indivisible. Time isn't really made of segments. Time is the continual flow of change. But intellectually we measure it in segments of second, minutes, days, years etc. Similarly with distance. Distance isn't really split into segments of metres, miles, kilometres etc. These finite measures are used by the human mind to understand portions of infinity.
What we have is an infinite world being understood in finite terms. These finite terms can be useful but never truly accurate. Humanity can develop a great intellectual understanding of the universe in finite terms, and that's useful, but it needs to be recognised that it will never be wholly accurate. Any theory about the universe, reality and existence will be inaccurate. It's just that some are less inaccurate than others. Knowledge is seemingly limited.
There is a difference between knowledge and knowing that may be overlooked. We may have knowledge about how to make a spaghetti bolognese, but there is a knowing of this knowledge. The knowing of knowledge is the same knowing of feelings, sensations and perceptions. When a bird is seen to fly past, a car is heard driving by, or a train of thought flows by, these are known in the same way that knowledge is known. There is a Knowing. This Knowing, in Non-Duality terms, is Aware Being. It is the Awareness or Consciousness in which the world is perceived. It is the Formless that perceives form.
It is this Infinite Knowing in which the apparently finite knowledge of the infinite appears. Nothing is truly finite. All seemingly finite things appear in the Indivisible Infinite. Time is not divided. Space is not divided. Forms flow continually from this to that, without ever truly being divided into this or that. We have knowledge in finite terms, but the Truth is Infinite.