Bhagavad Gita: Chapter 2, Verse 41

व्यवसायात्मिका बुद्धिरेकेह कुरूनन्दन ।
बहुशाखा ह्यनन्ताश्च बुद्धयोऽव्यवसायिनाम् ॥ २-४१ ॥

vyavasāyātmikā buddhir ekeha kuru-nandana
bahu-śākhā hy anantāś ca buddhayo ’vyavasāyinām 2.41

O child of the Kurus, the intellect of those who are on this path is resolute, and their aim is one. But the intellect of those who are irresolute is many-branched.