Psalm 39:11 is a powerful and somewhat challenging verse that speaks to the fragility of human life and the impact of God's correction. Let's break it down:

"When you rebuke and correct man for iniquity..."

Rebuke and Correct: This refers to God's act of pointing out wrongdoing and providing a means for correction. It highlights the idea that God doesn't ignore sin; He addresses it.
Iniquity: This means wickedness, sin, or moral wrong. God's correction is directed towards these flaws in human behavior.

"...You consume his wealth like a moth."

Consume his wealth like a moth: This is the crux of the verse and open to multiple interpretations:
Literal Interpretation (Material Wealth): God's judgment, when it comes, can strip away material possessions. Just as a moth silently and persistently eats away at fabric, God's discipline can erode one's wealth. This could be through financial hardship, loss of property, or other forms of economic setbacks. This interpretation connects wealth to a potential consequence of sin and divine correction.
Figurative Interpretation (Health, Strength, and Appearance): "Wealth" can be interpreted more broadly than just money. It can encompass physical health, strength, beauty, reputation, and general well-being. When God rebukes someone, these aspects might deteriorate, symbolizing the wasting away of what they held valuable. Sickness, aging, or a tarnished reputation could be seen as the "moth" consuming their "wealth" in this broader sense.
Emotional/Spiritual Interpretation (Pride and Self-Reliance): The "wealth" could represent a person's pride, self-sufficiency, and sense of invincibility. When God rebukes them, it humbles them, eroding their self-reliance and forcing them to recognize their dependence on Him. The "moth" consumes their false sense of security and control.
Shortness of life Interpretation: When God rebukes us with sickness as a consequence for sin, it is a reminder that our lives are fragile and short, like a garment easily consumed by moths.

"Surely every man is but a breath.” Selah."

Surely every man is but a breath: This emphasizes the transience and fleeting nature of human life. The word "breath" (Hebrew: hebel) is often translated as "vapor," "vanity," or "emptiness." It underscores the idea that our existence is temporary and easily extinguished. It highlights the contrast between our seemingly important concerns (like wealth or reputation) and the ultimate reality of our limited lifespan.
Selah: This is a Hebrew word found in the Psalms, its exact meaning is uncertain, but it is generally understood as a musical notation, a pause for reflection, or an emphatic affirmation of the preceding statement. In this context, it encourages the reader to contemplate the brevity of life and the implications of God's rebuke.

Overall Meaning and Interpretation

The verse is a somber reflection on the consequences of sin and the fragility of human existence. It suggests:

God disciplines those He loves: Rebuke and correction are signs of God's active involvement in our lives, aiming to lead us back to righteousness.
Sin has consequences: While not always immediate or obvious, sin can lead to the erosion of things we value, whether material possessions, health, or even our sense of self-importance.
Life is fleeting: We must remember that our time on Earth is limited. This should encourage us to seek God, repent of our sins, and live in a way that honors Him.
Humility before God: Recognizing our vulnerability and dependence on God is essential. God's correction can be a humbling experience, bringing us to a place of repentance and reliance on His grace.

In conclusion, Psalm 39:11 is a reminder of God's sovereignty, the consequences of sin, and the need for humility and repentance in light of the brevity of human life. It calls us to examine our lives, acknowledge our dependence on God, and seek His correction and guidance. The "Selah" invites us to pause and deeply consider the profound implications of these truths.