Proverbs 19:21
רַבּוֹת מַחֲשָׁבוֹת בְּלֶב אִישׁ וַעֲצַת ה' הִיא תָקוּם
There are many intentions in a person’s heart but it is the counsel of Hashem that will stand.
Continuing pesukei d'zimra, the morning verses of praise
The Metzudas David explains that a person can have many different plans, yet it’s possible that not a single one of them will ever actually come to fruition. But when G-d decides that something will happen – it happens!