"What is thematically posited is only what is given, by pure reflection, with all its immanent essential moments absolutely as it is given to pure reflection"

This quote by Edmund Husserl is referring to the concept of pure reflection, which is a philosophical concept that suggests that understanding can be gained through the procedure of reviewing one's own thoughts and experiences. Husserl is suggesting that what is thematically presumed, or what is accepted as real, is only what is offered to us through pure reflection. He is emphasizing that the important moments of this reflection need to be accepted as they are given, with no alteration or manipulation. This concept recommends that understanding can be gained through self-reflection, and that it is important to accept the vital moments of this reflection without altering them. Husserl's quote is a suggestion that understanding can be gained through self-reflection, which it is important to accept the vital moments of this reflection without changing them.