All men do not know all things; in fact, there is none, who is acquainted with all the branches of knowledge. In one person, the knowledge in its entirety, is not centered.
सर्वः सर्वं न जानाति सर्वज्ञो नास्ति कश्चन। नैकत्र परिनिष्ठास्ति ज्ञानस्य पुरुषे क्वचित्॥