to take a oath to oneself

taking a oath to oneself

goal, objective, target

to achieve

achievement

vow / swear / pledge

(archaic, Shinto, Japanese mythology) an "oath", a ritual in which whether something is true or false, right or wrong, good or evil, etc. is judged based on whether the stated outcome of an act comes true as expected

oneself / first-person pronoun: I, me (often shows the speaker's lower position in a hierarchy than the addressee) / (Kansai) you

to stand, to place in an upright position / to release something physical but not solid or liquid / (Internet slang) to start (a thread)

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend