A qualified poem is a poem that has a balance between an outward form and its inner form. It is this balance that gives the beauty of language and the beauty of meaning to a poem. Therefore, someone who wants to write poetry must take this balance aspect.
The outward form is the traits that nurture a poem. These traits can be seen.lines, sounds, word selection, figurative language, concrete words, abstract words, language deviations, and typography are forms of poetry.
The internal structure of poetry consists of themes, feelings, tones or attitudes and messages. The theme is the main idea that a poet will convey in a poem.Among the themes in poetry are religious,
humanity, and nationalism, economy, and politics. Feelings are the atmosphere of poet's feelings that are included in the poetry and can be appreciated by the reader. The feeling may be sympathy, sadness, hatred, anger, pity, resignation, and so on.
The tone is the poet's poet's attitude to the reader.the poet's attitude may be patronizing, mocking, advising, and telling the reader something. A message is a matter that encourages a poet to write poetry. The message is implied on the reverse of the revealed theme.
By @yusmin