Subhashitams from Saundarananda

यद् यदेव प्रसक्तं हि वितर्कयति मानवः। अभ्यासात् तेन तेनास्य नतिर्भवति चेतसः॥

yad yad eva prasaktaṃ hi vitarkayati mānavaḥ । abhyāsāt tena tenāsya natir bhavati cetasaḥ ॥

Whatever a person repeatedly dwells upon becomes the direction in which the mind inclines.