Additional Information:

यस्य त्वेतानि चत्वारि वानरेन्द्र यथा तव
धृतिः दृष्टिः मतिः दाक्ष्य स कर्मसु न सीदति

O Chief of Monkeys, one like you who has these four qualities- endurance, farsightedness, intellect, and ability- does not falter in action

Context:  Lord Hanuman travels from top of the Mahendra Giri (having control over indriyas or senses) to the Trikuta mountain (the three kutas - rajasic, tamasic and Satva gunas). During the forward journey HE encounters three different obstacles: one a friendly obstacle from the mainaka mountain followed by a test by devas through Surasa, and followed by an attempt by the rajasic being Simhika to kill the lord. The three obstacles could be interpreted by tests from the three gunas cited above. The verse from 1st Sarga is given after he emerges triumphant. The verse shows importance of the four virtues to prosecute any action whether secular or spiritual.