ChU 7.5.1
चित्तं वाव संकल्पाद् भूयः । यदा वै चेतयते ऽथ संकल्पयते । अथ मनस्यति । अथ वाचम् ईरयति । ताम् उ नाम्नीयूअति । नाम्नि मन्त्रा एकं भवन्ति । मन्त्रेषु कर्माणि
cittaṃ vāva saṃkalpād bhūyaḥ | yadā vai cetayate 'tha saṃkalpayate | atha manasyati | atha vācam īrayati | tām u nāmnīyūati | nāmni mantrā ekaṃ bhavanti | mantreṣu karmāṇi
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Consideration (kitta) is better than will. For when a man considers, then he wills, then he thinks in his mind, then he sends forth speech, and he sends it forth in a name. In a name the sacred hymns are contained, in the sacred hymns all sacrifices.
Translated by F. Max Müller