The intended study is to reveal the importance of values in the process of constructing our implicit knowledge. There is a strong connection between emotions and knowledge and this relationship appears especially in the process of evaluation. Our approach describes knowledge as more intuitive and emotional and unconscious than is traditionally proclaimed. It serves especially practical and useful purpose and our former experience is its foundation. As we evaluate the world which we get to know, our system of knowledge contains also its meaning for us, our value system is hidden in it and it influences our further conduct. Our activity is the aim of our life, through which we cause changes in the world as well as in us. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.