There are two types of knowledge which man needs to acquire. The first is the secular or material knowledge, which enables him to read and write, perform his daily chores, earn his livelihood, and lead his life in the world by using his senses and mental faculties. But this is merely ordinary knowledge. The real knowledge is Atma-vidya or spiritual knowledge, which enables man to go beyond the senses and the mind, inculcate noble qualities of penance and renunciation, develop wisdom, and attain true peace and happiness. The Knowledge that caters to bodily needs and senses cannot provide true peace and happiness to man. The human body has been gifted to man to perform selfless and good actions. One does not need to be highly educated to use one's body for performing sacred actions. It is the spiritual knowledge that helps man to lead a noble and sublime life. However, spiritual knowledge must be combined with penance. The relationship between spiritual knowledge and penance is like positive and negative charges. Man needs both secular and spiritual knowledge to lead a fulfilling and purposeful life.