As stated in Srimad-Bhagavatam, the perfection of life is to remember Narayana at the time of death

Expressions researched:
"the perfection of life is to remember Narayana at the time of death"

SB Canto 5

Whatever way of spiritual realization we accept, the ultimate goal is Nārāyaṇa, the Supreme Personality of Godhead. The living entities are eternally connected with Him via devotional service. As stated in Śrīmad-Bhāgavatam, ante nārāyaṇa-smṛtiḥ: the perfection of life is to remember Nārāyaṇa at the time of death.

SB 5.14.45, Purport:

The entire Vedas are meant for the understanding of karma, jñāna and yoga—fruitive activity, speculative knowledge and mystic yoga. Whatever way of spiritual realization we accept, the ultimate goal is Nārāyaṇa, the Supreme Personality of Godhead. The living entities are eternally connected with Him via devotional service. As stated in Śrīmad-Bhāgavatam, ante nārāyaṇa-smṛtiḥ: (SB 2.1.6) the perfection of life is to remember Nārāyaṇa at the time of death. Although Bharata Mahārāja had to accept the body of a deer, he could remember Nārāyaṇa at the time of death. Consequently he took birth as a perfect devotee in a brāhmaṇa family. This confirms the statement of Bhagavad-gītā (6.41), śucīnāṁ śrīmatāṁ gehe yoga-bhraṣṭo 'bhijāyate: "One who falls from the path of self-realization takes birth in a family of brāhmaṇas or wealthy aristocrats." Although Mahārāja Bharata appeared in the royal family, he became neglectful and took birth as a deer. Because he was very cautious within his deer body, he took birth in a brāhmaṇa family as Jaḍa Bharata. During this lifetime, he remained perfectly Kṛṣṇa conscious and preached the gospel of Kṛṣṇa consciousness directly, beginning with his instructions to Mahārāja Rahūgaṇa. In this regard, the word yogāya is very significant. The purpose of aṣṭāṅga-yoga, as stated by Madhvācārya, is to link or connect with the Supreme Personality of Godhead. The goal is not to display some material perfections.