Sankaracarya's Vivekachudamani 554

लक्ष्यालक्ष्यगतिं त्यक्त्वा यस्तिष्ठेत्केवलात्मना ।

शिव एव स्वयं साक्षादयं ब्रह्मविदुत्तमः ॥

lakṣyālakṣyagatiṃ tyaktvā yastiṣṭhetkevalātmanā |

śiva eva svayaṃ sākṣādayaṃ brahmaviduttamaḥ ||

(Sankaracarya's Vivekachudamani 554)

He who has renounced the anxiety to reach the Goal or not to reach the goal, and abides as the Self alone, indeed, he is verily Siva himself, the best among the knowers of Brahman.

The ultimate goal of all human beings to understand the purpose of birth and reach the Supreme Personality of Godhead. Either one is the knower of the truth that he is simply a soul or he is without care enjoying the material world, such persons have the quality of Lord Siva who is the absolute knower of the Supreme Lord Jagadishwara.