It is a qualification of the great thinkers to pick up the best even from the worst. It is said that the intelligent man should pick up nectar from a stock of poison, should accept gold even from a filthy place, should accept a good and qualified wife even from an obscure family and should accept a good lesson even from a man or from a teacher who comes from the untouchables. These are some of the ethical instructions for everyone in every place without exception. Just like in India, for higher technological knowledge, they come to foreign countries. So for knowledge we can take it from anywhere. There should not be sectarianism, Oh, why shall I take knowledge from here and there? Wherever knowledge is available, we should take it. That is the real position of seeker of knowledge.