Existence of Brahman: According to Taittirīya Upaniṣad

According to Vedantins, Brahman is the only real entity. Brahman is of the nature of existence, awareness and fullness. The World is apparently true. But before the truth of Brahman can be ascertained, Its existence must be proved because the real nature of Brahman that has been known as merely existing, becomes favorable for self-revelation. Although the self-manifestation of Brahman is famous, this article presents the proof of the existence of Brahman for calming the minds of those who love to present reason in every deeds. Therefore, there are four proofs in Taittiriya Upani?ad for proving the existence of Brahman - suk?tatva? (self-creator), rasatva?(source of happiness), pra?anadi kriya darsana?(the act of breathing), bhayabhayahetutva?(the cause of fear and fearlessness).