Expressions researched:
"kriyā-yoga"
This kriyā-yoga or karma-yoga, as recommended by Śrī Nārada to Vyāsa, is specifically recommended because the principle is to satisfy the Lord.
The general and popular notion is that by discharging fruitive work in terms of the direction of the scriptures one becomes perfectly able to acquire transcendental knowledge for spiritual realization. Bhakti-yoga is considered by some to be another form of karma. But factually bhakti-yoga is above both karma and jñāna. Bhakti-yoga is independent of jñāna or karma; on the other hand, jñāna and karma are dependent on bhakti-yoga. This kriyā-yoga or karma-yoga, as recommended by Śrī Nārada to Vyāsa, is specifically recommended because the principle is to satisfy the Lord. The Lord does not want His sons, the living beings, to suffer the threefold miseries of life. He desires that all of them come to Him and live with Him, but going back to Godhead means that one must purify himself from material infections. When work is performed, therefore, to satisfy the Lord, the performer becomes gradually purified from the material affection. This purification means attainment of spiritual knowledge. Therefore knowledge is dependent on karma, or work, done on behalf of the Lord. Other knowledge, being devoid of bhakti-yoga or satisfaction of the Lord, cannot lead one back to the kingdom of God, which means that it cannot even offer salvation, as already explained in connection with the stanza naiṣkarmyam apy acyuta-bhāva-varjitam (Śrīmad-Bhāgavatam 1.5.12).
All good fortune to you! Please explain to us, who are very eager to learn, the process of kriyā-yoga practiced through regulated worship of the transcendental Lord, the husband of the goddess of fortune. Please also explain how the Lord's devotees conceive of His limbs, associates, weapons and ornaments in terms of particular material representations. By expertly worshiping the Supreme Lord, a mortal can attain immortality.
Kriyā-yoga is a system of practice much like practical devotional service, but it is especially meant for the mystic yogīs.
Nectar of Devotion 9:
In the Agni Purāṇa it is stated, "Any person who in gladness sees the worship of the Deity in the temple will obtain the results of kriyā-yoga which are described in the Pañcarātra scripture." Kriyā-yoga is a system of practice much like practical devotional service, but it is especially meant for the mystic yogīs. In other words, by this gradual process the mystic yogīs are eventually elevated to the devotional service of the Lord.
Just like devotional program we have got. Bhajana-kriyā. Bhajana means devotional service, and kriyā... The yogis, they call kriyā-yoga.
Morning Walk -- June 9, 1974, Paris:
Prabhupāda: So after anartha-nivṛtti, one is firmly fixed up in devotional service. And if the anarthas are disturbing him, then he's not fixed up. He'll fall down. He'll fall down. That risk is already there. So these people are so much accustomed to this anartha, and they cannot give it up.
Bhagavān: What is the best way to gradually get them detached?
Prabhupāda: Huh?
Bhagavān: The best way to gradually get them detached?
Prabhupāda: Bhajana-kriyā. Therefore bhajana-kriyā, sādhu-saṅga (CC Madhya 22.83), association with devotees and stick to the devotional program. Just like devotional program we have got. Bhajana-kriyā. This is called bhajana-kriyā. One cannot be slack in the process of devotional service. Then it will be... Vidhi-mārga, the regulative principles: chant sixteen rounds, rise early in the morning, have maṅgala-ārātrika, read books, take your bath—these are the process. Bhajana-kriyā. Bhajana means devotional service, and kriyā... The yogis, they call kriyā-yoga.
taken from: https://vaniquotes.org/wiki/Kriya-yoga