An arm points north, east, south, then west. Ever in circles, never pausing to rest. It passes its brother twenty three times, As the sun passes by and the moon starts to climb.

Why this works

This riddle cleverly describes a clock using personification and imagery. The "arm" that points north, east, south, and west refers to the hour hand as it moves around the clock face in a circular motion, representing the continuous passage of time. The mention of it passing its "brother" twenty-three times refers to the twelve-hour cycle of a clock, where the hour hand circles back to the same position after completing a full rotation, effectively passing each hour mark as the day progresses. The reference to the sun and moon highlights the relationship between timekeeping and the natural cycle of day and night, further emphasizing the clock's role in measuring time.