What does it mean that nothing can be added to God's purpose?

In Ecclesiastes 3:14, it is stated, 'Nothing can be put to it, nor anything taken from it.' This verse clearly points out that God's will is absolute and inviolable. His decrees and purposes are set in stone and are eternally secure. This signifies that no matter how much effort humans exert, they cannot alter God's divine plan. Such a truth serves as both a comfort and a warning. It reassures believers that their salvation and existence are wholly dependent on God's grace, while it cautions against the arrogance of assuming that human beings can interfere with or improve upon God's designs.