Resolute; adjective 1) firmly resolved or determined; set in purpose or opinion. 2) characterized by firmness and determination, as in temper, spirit, actions, etc.
Strength; noun 1) the quality or state of being strong; bodily or muscular power; vigor. 2) mental power, force, or vigor. 3) moral power, firmness or courage.
We must each resolve ourselves to grow stronger, physically, mentally, and spiritually. We must become unwavering in our commitment, and unyielding in our determination.