what is the meaning of this quotation from Brown vs. Board of education?

what is the meaning of this statement: "Segregation of white and colored children in public schools has a detrimental effect upon the colored children. The impact is greater when it has the sanction of the law, for the policy of separating the races is usually interpreted as denoting the inferiority of the ***** group. A sense of inferiority affects the motivation of a child to learn. Segregation with the sanction of law, therefore, has a tendency to [retard] the educational and mental development of ***** children and to deprive them of some of the benefits they would receive in a racial[ly] integrated school system.