Verse
सर्गाणामादिरन्तश्च मध्यं चैवाहमर्जुन ।अध्यात्मविद्या विद्यानां वादः प्रवदतामहम् ॥
sargāṇāmādirantaśca madhyaṃ caivāhamarjunaadhyātmavidyā vidyānāṃ vādaḥ pravadatāmaham
Of creation I am the beginning and the end and also the middle, O Arjuna, I am spiritual knowledge among the many philosophies, arts and sciences; I am the logic of those who debate.
Gītā 10·32