Voltaire's quote, "Everything's fine today, that is our illusion," highlights the idea that people often perceive everything as going well in the present moment, even though there may be underlying issues or challenges. This quote serves as a reminder that it is important to remain aware of the reality of a situation, rather than being overly optimistic or complacent. Voltaire's use of the word "illusion" suggests that our perception of things being fine may not always align with the actual state of affairs. This quote encourages one to look beyond the surface and recognize the complexities of life.