(idiomatic) To form one's personal opinions and choose one's actions without being governed by the views or choices of others; to be independently minded; to think for oneself.

Alternative form of hoist by one's own petard

Alternative form of hoist by one's own petard

Alternative form of hoist by one's own petard

Alternative form of hoist by one's own petard

(nautical, rail transport) Of the movement of a locomotive or a watercraft: by means of the power of its own engines (originally steam engines), rather than pulled or pushed by another vehicle.

a good deed is its own reward

Alternative form of virtue is its own reward

(idiomatic) To clearly understand one's own feelings, intentions, preferences, etc; to know precisely what one wants; to be decisive or determined.

(obsolete) To follow one's own opinion.