The phrase "hast oneself" is not commonly used in modern English, but there are several synonyms that can convey a similar meaning. The term "hurry" suggests a sense of urgency or quickness, whereas "rush" implies a need for speed or haste. "Hasten" also conveys a sense of urgency, as does the phrase "be quick." Alternatively, words such as "accelerate" or "expedite" imply a deliberate effort to move faster. Overall, there are many ways to express the idea of hastening oneself, and choosing the right synonym will depend on the context and intended meaning of the sentence.