to thine own self be true
Be yourself; be true to yourself; do not engage in self-deception.
This aboue all, to thy owne ſelfe be true, And it muſt follow as the night the day, Thou canſt not then be falſe to any one, […]
VERBS
be, ring, seem, sound
His story about why he was late didn't seem true to me.
come
After years of hard work, his dream of becoming a doctor finally came true.
remain
ADV
particularly, very
My grandmother's love for her garden has always been particularly true to her values.
absolutely, perfectly, quite
My grandmother's old recipe turned out absolutely true to what I remembered from childhood.
certainly
It is certainly true that learning a new language takes time and practice.
by no means, far from, not at all
Her promise to help with the project was by no means true.
hardly, not completely, not entirely, not quite, not strictly, scarcely
She wasn't entirely true to her promise to quit eating sugar.
almost, more or less, pretty well
His account of what happened that night was pretty well true.
objectively
VERBS
be | remain, stay
ADV
absolutely
PREP
to
He remained true to his promise even when times became difficult.