They come from consciousness. "Heart" is a euphemism, symbolism, metaphor, that can describe many aspects of self. Self=I=ego. It's all part of who you are. Ego is not purely "bad", nor good, just as anyone is not purely good or bad. There is too much polarized thinking when it comes to referring to the ego-personality-identity construct. You can't exist without one, just as the aspect of emotion, motivation, "heart", intents, desires, are part of our existence as well.

Here are some phrases with the “heart” used in it and what they symbolize to represent in meaning.

“Heart of tree”, core.
“Heart of subject”, center, core, important, essential, nature/mater/matter.
“Heart of darkness”, inner depths, deepest part, etc.
“Heart of Man”/”Man’s Heart”, is the center of being, “spirit”, not the physical heart, which is the confusion people get into.
The “spirit of man” and “heart of man”, is the quintessence, the True Self, in True Care, striving for Truth and Morality.
The “spirit in which we do things” is the care, desire, motivation, etc.

Similarly as the body is not the “you” yourself of consciousness, the brain and heart are not the “you” either, they are not the mind or emotions of consciousness, though the mind and emotions may work through our physical components of brain and heart.

“Heart” is also related to courage. Courage comes from Latin ‘cor’, which is heart. Core comes from heart, ‘cor’.

“Heart” in its “spiritual” symbolic definition is best represented as True Care. It is the symbol for the reaching the real self, the center of being, the living in authentic, realized, actualized, examined, True Self in harmony and alignment with Truth and Morality. You cannot be “pure-hearted”, just like you cannot be “pure Truth” or “pure Morality”. “Pure-hearted” would only mean that you strive to be pure in “heart”, better and do less wrong, not that you are actually “pure in heart”. We can never be “pure”/”perfect” anything, but we can purify and refine ourselves to that likeness. So “pure-hearted”, “perfect in heart”, is only the general True Care, desire and will to do what is right, good and true, at all times. If you do wrong, and don’t want to change, then you are not living in the “spirit” of being “pure-hearted”, since you lack True Care to align with Truth and Morality as you discover it in greater depths.

The “heart” is viewed as the fountain of man’s deeds, the driving motivational source of desire and will power. The True Care “heart” will help to generate a proper evolution in consciousness. Anything we care for is what drives us to seek and have it, accomplish a task, etc. The symbolic scales of Ma’at are weighing the heart as representative of our negative, harmful deeds, which are our actions.

Peace.