Lead me to truth

This mantra is used to lead us from the ignorance of truth.

असतोमा सद्गमय। तमसोमा ज्योतिर् गमया।

मृत्योर्मामृतं गमय॥

Aum Asato mā sad gamaya--From ignorance, lead me to truth

Tamaso mā jyotir gamaya --From darkness, lead me to light;

Mṛtyormā amṛtam gamaya --From death, lead me into immortality

Aum śānti śānti śāntiḥ

(Bṛhadāraṇyaka Upaniṣad I.iii.28)

These are versus from Bhagatvat gita.