यदभावि न तद्भावि भावि चेन्न तदन्यथा । इति चिन्ताविषघ्नोऽयं बोधो भ्रमनिवर्तक: ॥
Yad abhāvi na tad bhāvi, bhāvi cet na tad anyathā;
Iti cintā-viṣaghno’yaṁ bodho bhrama-nivartakaḥ.
“What will not happen will not happen. What will happen will happen”—this knowledge destroys the poison of anxiety and removes all delusion.
That’s from the Pañcadaśī, your new favorite book.