Abstract
This article aims at discussing some aspects of the relationship between science, truth and belief. I will primarily focus on the scientific activity in the biological and medical sciences and how it relates to the notion of truth and belief and not discuss the relationship with specific religions. Science has specific methodologies to obtain knowledge. Philosophers have analyzed how scientific knowledge is acquired and have tried to identify its characteristics and to establish some general rules of how knowledge through science is gained. Radical theorists have disputed the value of the scientific method despite science’s indisputable successes. If science is a rational activity, it is not free from belief. Belief can have a positive and negative impact on the acquisition of scientific knowledge and the idea of human nature. These different issues will be discussed in depth in this article.