The phrase "casts down" is typically used to indicate lowering or bringing someone or something to a lower position or state. Antonyms for this phrase could include lifting, elevating, supporting, uplifting, fostering, encouraging, and inspiring. These words suggest positivity and growth, signifying an increase in morale, hope, or self-worth. For example, rather than being cast down by a failed attempt, one can be lifted up by the lessons learned through the experience, or encouraged by the support of friends or family. Ultimately, the antonyms for "casts down" signify a sense of progress and development, in contrast to the negative connotation of the original term.