free and independent choice; voluntary decision

You took on the responsibility of your own free will.

Philosophy . the doctrine that the conduct of human beings expresses personal choice and is not simply determined by physical or divine forces.

the power of making free choices unconstrained by external agencies

The power asserted of moral beings of willing or choosing without the restraints of physical or absolute necessity.

noun

responsibility

noun

assent , choice , conation , consent , desire , determination , discretion , free choice , free decision , freedom , inclination , intention , mind , one\'s discretion , one\'s own choice , one\'s own will , option , own say so , own sweet way , person’s full intent and purpose , pleasure , power , say so , velleity , volition , voluntary decision , willingness , wish