All lectures and books do little good and are of use only for beginners, to point out on the way. The real service is done in meditation. One sitting still and silent — as mentioned in the poem by the Tamil saint Tayumanavar — can influence a whole country. The force of meditation is infinitely more powerful than speech or writings. One who sits in silence meditating on the Self, will draw a whole lot of people to him without his going out to anyone.