It is the same with poetry. Among the Hindus there is a psychology of poetry which is taught before one is allowed to write poetry. For it is not only the rhythm and the swing of mind and thought that should be expressed, but to write poetry means to construct something: to make something or to mar something. Poetry has sometimes the effect of bringing prosperity or decline to great ones in whose praise it has been written. There is a science attached to it; a poet may speak highly of a personality in his poetry, yet the construction of his words or the idea behind it may be harmful. It does not only harm the person for whom it was made, but sometimes - if that personality is strong the effect falls back upon the poet, thus destroying him for ever.