Buddha is the Enlightened One who knows precisely and understands thoroughly the source of all feelings.
Why should we understand the source of our feelings?
To understand ourselves and others thoroughly.
For what purpose?
For being able to live harmoniously with other people, faithfully with the Way, suitably with the natural order of heaven and earth, to keep the perpetuity of the universe.
Before knowing precisely and understanding thoroughly our feelings, our body and soul must be purified so that we may observe perceptions clearly, ours toward others, and theirs toward us.
Understanding clearly our perceptions, ours toward others, and theirs toward us, in a way we may obtain clairvoyance.
Such clairvoyance is Buddha’s Nature, the true love - no longer motivated by love and hatred, good and bad. This is love without initiation.
This is the True Heart.