Yoga Sūtra Chapter Four verse 9
जाति देश काल व्यवहितानामप्यान्तर्यां स्मृतिसंस्कारयोः एकरूपत्वात् ॥९॥
jāti-deṣa-kāla-vyavahitānām-api-ānantaryaṃ smṛti-saṃskārayoḥ eka-rūpatvāt ||9||
Even though separated by existence, place and time,
there is a succession because memory and tendencies are of one character.
Commentaries and ReflectionsTKV Desikachar:
Saṃskāra is so powerful, it can lead you to act without thinking.
We can have two opposite Saṃskāra, but only one can act at any one time.