The nobility in the European countries and Russia of the Middle Ages and the New Age is the dominant class of secular landowners, possessing hereditary privileges. The nobility was formed as part of the performance of a military function (chivalry). The various privileges were based on the duty of the nobility to fight (blood tax): tax exemptions, privileges in court, the right to occupy certain positions, exemption from corporal punishment, etc. From other classes, the nobility was distinguished by its position as the main part of the ruling stratum, military and administrative functions, privileges, education and upbringing, lifestyle, morality with its ideas about honor as the highest value.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.