Virtual particles can appear in a vacuum but do not become real particles, as clarified in the discussion. The concept of virtual particles does not imply that a vacuum can be transformed into matter over time. The Casimir effect demonstrates measurable forces between plates due to quantum vacuum fluctuations, but this does not validate the existence of infinite matter. The discussion emphasizes the importance of credible scientific references when making claims about virtual particles and vacuum energy. Ultimately, the nature of vacuum energy remains a complex topic, and the thread was concluded with a recommendation for further reading.