Human existence in this world is defined by extreme fragility, temporary conditions, and a constant motion toward its end, leaving a person unable to firmly grip the reality of life. The primary approach among commentators compares a person to a flower that blossoms beautifully but immediately withers, dries up, and is easily cut down. This reflects how human life lacks lasting strength and spans only a brief time. A deeper perspective is offered by [מלבי״ם], who explains that just as a plant's blooming marks both the peak of its life and the beginning of its decay, a person reaches their peak in the middle of life when establishing a family. From that exact moment, the steady decline toward old age and death begins. Taking a more specific approach, [אלשיך] explains that this swift cutting down refers to a person who passes away at a young age or without leaving children behind.
The fleeting nature of life is further illustrated by the image of a shadow, which represents the rapid passage of time. As noted by [מצודת דוד, מלבי״ם], a shadow depends entirely on the movement of the sun. It never rests in one place and completely disappears once the sun sets. In the same way, a person constantly moves toward death, entirely unable to stop time or remain in a stable condition. Additionally, a shadow highlights a person's lack of true substance in this world. Because a shadow constantly changes its size and shape, it represents a total lack of stability [ביאור שטיינזלץ].
A completely different spiritual angle views these concepts through the process of correcting the soul [אלשיך]. According to this approach, a rapid departure from the world is actually an act of kindness from God. This quick exit is designed to rescue a person from severe suffering they would have experienced had they continued to live. Furthermore, the inability to stand still does not merely describe physical instability in this world. It also hints that the soul will not simply remain in the next world. Instead, it will return to this world in a reincarnation to complete its necessary correction free from suffering.