The highest perfection of such consciousness is called Kṛṣṇa consciousness. According to the body given by prakṛti, or nature, one's consciousness is present; according to the development of consciousness, one's activities are performed; and according to the purity of such activities, one realizes the Supreme Personality of Godhead, who is present in everyone's heart. The example given herein is very appropriate. Fire is always the same, but according to the size of the fuel or burning wood, the fire appears to be straight, curved, small, big, etc.
According to the development of consciousness, God realization is present. In the human form of life it is recommended, therefore, that one undergo the different types of penances and austerities described in Bhagavad-gītā (karma-yoga, jñāna-yoga, dhyāna-yoga and bhakti-yoga). Like a staircase, yoga has different steps for reaching the topmost floor, and according to one's position upon the staircase, he is understood to be situated in karma-yoga, jñāna-yoga, dhyāna-yoga or bhakti-yoga.
(Srimad Bhagavatam---4:21:35---purport).

We are evolving through different statuses of material bodily existence—sometimes in a human body, sometimes in an animal body—and therefore the engagements of our material senses are also changing. Anything which changes is called temporary, or asat. We should know that beyond these temporary senses are our permanent senses, which are now covered by the material body. The permanent senses, being contaminated by matter, are not acting properly. Devotional service, therefore, involves freeing the senses from this contamination. When the contamination is completely removed and the senses act in the purity of unalloyed Kṛṣṇa consciousness, we have reached sad-indriya, or eternal sensory activities. Eternal sensory activities are called devotional service, whereas temporary sensory activities are called sense gratification. Unless one becomes tired of material sense gratification, there is no opportunity to hear transcendental messages from a person like Kapila. Devahūti expressed that she was tired. Now that her husband had left home, she wanted to get relief by hearing the instructions of Lord Kapila.
(Srimad Bhagavatam---3:25:7---purport).

"Peacefulness, self-control, austerity, purity, tolerance, honesty, wisdom, knowledge, and religiousness-these are the qualities by which the brāhmaṇas work." (B.G.-18:42) These qualities are manifest in the body of a Vaiṣṇava. Therefore a perfect Vaiṣṇava is also a perfect brāhmaṇa, as indicated here by the words brahmaṇyaḥ śīla-sampannaḥ. A Vaiṣṇava is always determined to understand the Absolute Truth, and to understand the Absolute Truth one needs to have full control over his senses and mind. Prahlāda Mahārāja possessed all these qualities. A Vaiṣṇava is always a well-wisher to everyone. The six Gosvāmīs, for example, are described in this way: dhīrādhīra jana-priyau. They were popular with both the gentle and the ruffians. A Vaiṣṇava must be equal to everyone, regardless of one's position. Ātmavat: a Vaiṣṇava should be like Paramātmā. Īśvaraḥ sama-bhūtānāṁ hṛd-deśe 'rjuna tiṣṭhati. Paramātmā does not hate anyone; indeed, He is in the heart of a brāhmaṇa, but he is also even in the heart of a pig. As the moon never refuses to distribute its pleasing rays even to the home of a caṇḍāla, a Vaiṣṇava never refuses to act for everyone's welfare. Therefore a Vaiṣṇava is always obedient to the spiritual master (ārya). The word ārya refers to one who is advanced in knowledge. One who is deficient in knowledge cannot be called ārya. At the present, however, the word ārya is used to refer to those who are godless. This is the unfortunate situation of Kali-yuga.
(Srimad Bhagavatam---7:4:31-32---purport).