Here are some quotes by Srila Prabhupada on the Four Vaisnava Sampradayas.  They are organized first by quotes about all four in general, and then by individual line.

By HH Sivarama Swami

Thirty years ago I was doing the Prabhupada marathon at the Chicago
airport. One afternoon, we devotees were so intoxicated by
distributing books that we decided to show that one doesn’t have to
speak to sell books, that book distribution just depends on our state
of consciousness. So we didn’t speak.

Just after loading my bookbag with (20) maha books I tapped a man on
the arm and looked him in the eye. He stopped, expecting me to say
something. I didn’t. I put a book in his hand, p

In this material world, whether we like or not, everyone--young, old, and in between--is living on the verge of death because death can come at any moment even when we least expect it.  This means that whatever we may establish for ourselves here in this world is nothing more than a castle made of sand that will be completely washed away the next time the tide comes in. So whether one thinks that life ends with the death of the body or that one has an eternal existence beyond this body, there is

Question: Vegans claim that we are contributing to factory farming and
calves being deprived of their mothers’ milk. How do we address this
argument?

Answer: There are two points here, first that a cow gives more milk
than a calf can drink, so it’s not necessarily that they’re being
deprived. However a calf should be able to drink its mothers milk, and
that happens when they’re being taken care of in a natural way in a
gosala. The calves drink their mothers’ milk and the cow gives more
milk. Also, if yo

By HH Sivarama Swami

Devotees often ask what the meaning of steadiness is: some consider
that chanting sixteen rounds a day and following the four regulative
principles means that one is steady, while others say it is steadiness
in one’s service; yet others give different variations of what they
consider steadiness to mean. But these things mentioned—regularly
chanting and regularity in serving—are physical symptoms that may or
may not indicate real steadiness.

Suddha-bhakti-cintamani deals with the sub

Dhruva Maharaj: “Because of my state of complete foolishness and
paucity of pious activities, although the Lord offered me His personal
service, I wanted material name, fame and prosperity. My case is just
like that of the poor man who, when he satisfied a great emperor who
wanted to give him anything he might ask, out of ignorance asked only
a few broken grains of husked rice.”

PURPORT

In this verse the word svārājyam, which means “complete independence,”
is very significant. A conditioned soul does no

"Religion" is the world's most misunderstood and abused word. Real religion means the science of God, the process of fully reviving one's original pure identity by reconnecting oneself with the source of his existence. But instead, without ever understanding religion's real meaning, people take it either as a fable for childlike fools or as a divisive sect for fulfilling their temporary material desires. Thus they cheat themselves and remain perpetually in the darkness of ignorance miserably mis

Arjuna's constant remembrance of the lotus feet of Lord Śrī Kṛṣṇa rapidly increased his devotion, and as a result all the trash in his thoughts subsided.

PURPORT

Material desires in the mind are the trash of material contamination. By such contamination, the living being is faced with so many compatible and incompatible things that discourage the very existence of spiritual identity. Birth after birth the conditioned soul is entrapped with so many pleasing and displeasing elements, which are all f