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Mishlei 18-15 (Learning)

Key Concepts of Mishlei 18-15 (Learning)
Every righteous person should be engaged in learning Torah to a greater or lesser degree throughout his life. But the learning process has two major modes, which are not equally accessible. One of these two modes depends upon an external source of knowledge (received wisdom). The other depends upon the knowledge that the person has already acquired, but has extended through study and reflection.
Historically, the external source of knowledge is the teacher, the one who has acquired knowledge and is willing to share it. There was a time when such transmission depended primarily upon the spoken word. Over the centuries, the transmission of knowledge has been vastly facilitated by means of the written word in script and printed form.
The internal source of knowledge is the knowledge that has already been acquired and exists within the mind. Upon reviewing this knowledge and thinking it through, the person realizes there are gaps in his knowledge and looks to fill them. He may do so by going back to his teacher and asking questions. He may also apply his mind to what he has already learned. After expending some degree of mental effort Hashem may grant him a spark of insight which casts a new light on his previous knowledge. He then realizes that the answer he is seeking already exists deeply within what he learned before. The revelation gives him a new insight that puts it all together.
The two modes of learning are clearly related. In effect, every qualified person has the potential to learn from internal or external knowledge, mixing elements of each mode to a greater or lesser degree. This depends on his abilities and his character. Essentially, all Torah knowledge originates as external knowledge, starting with the words spoken through Moshe Rabbeinu at Har Sinai. Throughout the generations, righteous scholars have extended this base of external knowledge with knowledge developed through the internal learning process.
Exploring Mishlei
לֵב נָבוֹן יִקְנֶה דָּעַת וְאֹזֶן חֲכָמִים תְּבַקֶּשׁ דָּעַת:
An understanding heart acquires knowledge, and the ear of the wise seeks knowledge.
The two parts of this proverb correspond to the two modes of learning and they are structured so as to reveal characteristic aspects of each mode.
Both modes of learning are oriented to the same goal, which is defined as knowledge ( דָּעַת ). The two mode of learning are associated with corresponding organs of the body: the heart ( לֵב ) or the ear ( אֹזֶן ). The ear is a means of receiving external knowledge from a teacher, whereas the heart (or mind) is a means of storing knowledge and building upon to discover new knowledge.
The process of gaining knowledge from a teacher depends upon actively seeking a good teacher and actively listening to his words. All of these activities are conveyed by the powerful word “seeks” ( תְּבַקֶּשׁ ). It takes wise people ( חֲכָמִים ) to patiently listen to a teacher and absorb what he has to say.
The process of gaining knowledge from previously learned knowledge depends upon intensely focusing on each element knowledge in one’s mental inventory and studying it to find a critical insight that becomes new knowledge. This similar to the process of a shopper who patiently investigates goods that are being offered for sale and ultimately discovers something that answers his particular need, such as when existing knowledge answers a question that has been bothering the student. This process of acquisition by purchase is described with the word “acquires” ( יִקְנֶה ). The person who makes this acquision is characterized by the word “understanding” ( נָבוֹן ), because he is building new knowledge from his understanding of previous knowledge.
Learning Mishlei
לֵב נָבוֹן יִקְנֶה דָּעַת 
וְאֹזֶן חֲכָמִים תְּבַקֶּשׁ דָּעַת:
An understanding heart  לֵב נָבוֹן acquires new knowledge  יִקְנֶה דָּעַת from existing knowledge through study and reflection. And the ear  וְאֹזֶן of wise men  חֲכָמִים seeks to receive knowledge  תְּבַקֶּשׁ דָּעַת from other wise men who are able to share it.