What are your thoughts on the idea of infinity? Do you think there is such a thing?

I'm inspired to ask this because I read an article a few days ago in which a mathematician was explaining how the idea of infinity can be applied to the life of a human being especially concerning the ending of said life. According to this mathematician, since we are made up of many molecules or particles even if somebody chooses to end their life, said life doesn't really end because we're only just killing one small particle of ourselves but we continue to live on just in a other dimension. We are infinite according to the laws of numbers and science. So agree or Disagree? To believe or not to believe? If it's an eye opener for you how does it change your perspective on life?
What are your thoughts on the idea of infinity? Do you think there is such a thing?
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