When it comes to showing a high level of dedication and commitment to a cause, the phrase "devote oneself to" comes to mind. However, it may be beneficial to switch things up and vary our language to avoid repeating the same phrase time and time again. Some synonyms that could be used instead of "devote oneself to" include "dedicate oneself to," "commit oneself to," "immerse oneself in," "pour oneself into," and "be absorbed in." Each of these phrases contains a similar meaning to "devote oneself to," and using them in our writing or speech can add some variety and flair to our language.