The abstract nouns "trustworthiness," "meekness," and "righteousness" can be stated as adjectives. Possible meanings are 1) these are qualities of the mighty one. Alternate translation: "because you are trustworthy, meek, and righteous" or 2) these are virtues that he fights to uphold for the people whom he rules. Alternate translation: "in order to fight for what is trustworthy, meek, and right" (See: [[rc://en/ta/man/jit/figs-abstractnouns]])
Most soldiers held their swords with their right hands when they fought. Here, the phrase "right hand" refers to his ability to fight, which the writer speaks of as if it were a person who can teach the king through the experience he gains in battle. Alternate translation: "You will learn to accomplish great military feats by fighting in many battles" (See: [[rc://en/ta/man/jit/figs-metonymy]] and [[rc://en/ta/man/jit/figs-personification]])