It is generally believed that a high diploma guarantees a promising future. Some people identify high diplomas with profound knowledge and exceptional competence. Companies also tend to emphasize the academic achievement of a job candidate. Like it or not, there does exist a social reality – the higher diplomas one gets, the more popular he becomes.
On the contrary, other people claim that a high diploma doesn't automatically translate into knowledge. A diploma, in their eyes, is only the acknowledgment of one's educational experience rather than a guarantee of one's ability. Therefore, we can never measure the depth of one's knowledge by the grade of one's diploma. Besides, many knowledgeable people don't have a high diploma. Take Bill Gates for example. His dropping out of college cannot deny the fact that he is one of the world's most learned men.
So I must say no one should ever equate a diploma with knowledge, because a diploma is nothing but a proof of a short-term study while genuine knowledge needs one's lifelong devotion.