Gandhi, on languages

In his autobiography "My Experiments with Truth" (1927), Mahatma Gandhi wrote:

It is now my opinion that in all Indian curricula of higher education there should be a place for Hindi, Samskrit, Persian, Arabic and English, besides of course the vernacular. This big list need not frighten anyone. If our education were more systematic, and the boys free from the burden of having to learn their subjects through a foreign medium, I am sure learning all these languages would not be an irksome task, but a perfect pleasure. A scientific knowledge of one language makes a knowledge of other languages comparatively easy. In reality, Hindi, Gujarati and Sanskrit may be regarded as one language, and Persian and Arabic also as one. Though Persian belongs to the Aryan, and Arabic to the Semitic family of languages, there is a close relationship between Persian and Arabic, because both claim their full growth through the rise of Islam. Urdu I have not regarded as a distinct language, because it has adopted the Hindi grammar and its vocabulary is mainly Persian and Arabic, and he who would learn good Urdu must learn Persian and Arabic, as one who would learn good Gujarati, Hindi, Bengali, or Marathi must learn Sanskrit.