Something that is hard to understand is spoken of as if it were too high to reach. Alternate translation: "he cannot understand your righteous decrees" (See: [[rc://en/ta/man/translate/figs-metaphor]])
People snort at their enemies when they think that their enemies are weak and worthless. Alternate translation: "he thinks that all his enemies are weak and worthless" or "he sneers at all his enemies" (See: [[rc://en/ta/man/translate/translate-symaction]])