My Lord, if one is favored by even a slight trace of the mercy of Your
lotus feet, he can understand the greatness of Your personality.
But those who speculate in order to understand the Supreme
Personality of Godhead are unable to know You,
even though they continue to study the
Vedas for many years.

Lord Brahma's prayers to Lord Krishna
Srimad Bhagavatam 10.14.29

Sri Havir said: The most advanced devotee sees within everything the soul
of all souls, the Supreme Personality of Godhead, Sri Krishna.
Consequently he sees everything in relation to the Supreme
Lord and understands that everything that exists is
eternally situated within the Lord.

Havi Yogendra to King Nimi
Srimad Bhagavatam 11.2.45

Those who are advanced and highly qualified and are interested in the essence of life, know the good qualities of Kali-yuga. Such people worship the age of Kali because in this age, simply by chanting the Hare Krishna
maha mantra, one can advance in spiritual
knowledge and attain life's goal.

Sri Karabhajana to King Nimi
Srimad Bhagavatam 11.5.36

Krishna is the origin of Lord Vishnu He should always be
remembered and never forgotten at any time. All the rules
and prohibitions mentioned in the shastras should be the
servants of these two principles.

Padma Purana

A person who considers demigods like Brahma and Shiva to be on an equal
level with Narayana is to be considered an offender and an atheist.

Padma Purana