* On the importance of cleanliness: Lister believed that germs were the cause of infection, and that strict cleanliness was crucial to prevent them. This idea was revolutionary in the 1800s. You might see this reflected in his work: "The introduction of the antiseptic system has been followed by a complete change in the character of the wards, which are now as sweet and pure as any rooms in the house."
* On the use of carbolic acid: Lister was one of the first surgeons to use carbolic acid as an antiseptic. This quote from a paper published in 1867 summarizes his belief: "Carbolic acid, applied to the surface of wounds, has the power of destroying the germs which infect them."
* On the value of observation and experimentation: Lister was a dedicated scientist who believed in rigorous observation and experimentation. He used his observations to develop his antiseptic techniques. This quote reflects his belief: “It is only by such careful observation and deduction from it that we can arrive at the truth.”
Remember, Joseph Lister's greatest contributions weren't necessarily in his spoken words, but in his groundbreaking actions and publications. He is remembered as the "father of antiseptic surgery" for revolutionizing surgical practices and significantly reducing post-operative infections.