A profound sense of inner peace and deep contentment stands at the heart of this personal confession. It captures the pure joy of a person who feels truly fortunate in life, celebrating a close relationship with God and a destiny that feels entirely complete.
In ancient times, plots of land were divided and assigned using measuring ropes. Borrowing from this imagery, life's destiny is viewed as a measured portion of land [מצודת ציון, אבן עזרא, שטיינזלץ]. For the speaker, this personal plot has fallen in wonderfully pleasant places, representing not only a good physical location but also a life grounded in correct and proper beliefs [רד״ק, אבן עזרא]. The primary approach among commentators is that this beautiful inheritance symbolizes the immense joy and privilege of serving God. When a person realizes that their assigned lot in life is to be close to God, they view their destiny as uniquely pleasant and perfectly beautiful [רש״י, מאירי, מצודת דוד].
This sense of blessing can be understood as a harmony of two distinct types of happiness: the spiritual delights and eternal success of the soul, alongside the material success and physical assets one inherits from previous generations [מלבי״ם]. Taking a different approach, this inheritance can also be seen as representing the actual years of King David's life. Although these years were passed down from his forefathers, they were ultimately improved and brought to a state of true perfection through his own righteous actions [אלשיך].
A deep psychological truth is revealed in this attitude of complete satisfaction. Human nature often dictates that when resources or destinies are handed out, people naturally tend to envy their neighbors, convinced that others received a better share. Yet, the speaker completely breaks away from this natural tendency. He views his own portion as flawless and beautiful, harboring no doubts about how life's lots were divided and feeling absolutely no envy toward anyone else [רד״ק, מאירי]. This genuine contentment stands in sharp contrast to those who endlessly chase after luxuries, forever unable to find happiness in what they already possess [מלבי״ם].