M. Fethullah Gülen said this quote

True poetry is composed of metaphors and symbols which are born in the heart, rise like clouds, and assume a celestial form; verses formed otherwise are not poetry, but only artificial words, each of which contradicts the feelings inside. The utterances and words that have not been formed in a person’s soul as the voice of conscience are all hollow, no matter how embellished they are or how dazzling they seem to be.

~ M. Fethullah Gülen

True poetry is the perception of human feelings, the voice of the heart, open or hidden. It is the lyrics, compositions, and melody of the relation between humankind, the universe and God, a shadow pinpointing each of the truths we can discern everywhere (from the earth to the stars), a photograph of the creation’s projection cast in our feelings and thoughts and framed through words, a heartfelt tune of our loves and joys played on different strings, and it is a bouquet of our faith, hope, determination, beauty, love, reunion, and yearnings.

~ M. Fethullah Gülen

In fact, poetry has always been like archives that peoples have continually used to serve their feelings, thoughts, national identities and cultures, and it has served as a factor uniting different historical periods. Those who had lost contact with their past for a certain period found and experienced the expression of their own selves in poetry, and the were able to see their history as a whole in it.

~ M. Fethullah Gülen

But no matte what kind of an understanding is adopted, whether associated with positivism, which asserts that the truth can only be reached by trial and error, or rationalism, which asserts that everything can be explained and grasped by reason, whether the perspective of romanticism, which overemphasizes imagination and sensitivity, or an approach based on ardent naturalism, whether based on realism, which aims to describe everything as it is including its shortcomings, or a curiosity-raising approach such as surrealism, whether idealism, which asserts that there is nothing real but ideas, or cubism, which asserts that there is nothing real but instead of direct description, or some other such current or perspective, that is not true poetry.

~ M. Fethullah Gülen