rededicate oneself or to
rededicate (oneself) to (something)
To reassert or reaffirm one's dedication or commitment to something or some activity. That near-death experience really prompted me to rededicate myself to my faith. I'm really trying to rededicate myself to my career, because I've been feeling like I'm in a rut lately.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
rededicate oneself or something to someone or something
to reaffirm the dedication of oneself or something to someone or something. I must ask you to rededicate yourself to our high purposes. They rededicated their church to God.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.