Knowledge of what? What was this knowledge of 'good and evil' the second symbolic 'tree' knew? And why IF everything in Genesis 1 except for one verse, Genesis 1:2 is described as being good would there be a knowledge of good and evil? This 'knowledge' originated with someone at a particular point in time after Genesis 1:1.
The devil was most certainly created 'good' and most beautiful as accounted for in Ezekiel 28, and it says that the king of Tyre was in the Garden of God, Eden. When did the devil develop his narcissistic tendencies. According to what is Written it was sure before the formation of the flesh bodies of the Adam and 'that' woman.
Trees are used continuously throughout the Bible to help the student in the knowledge of horticulture to have a multidimensional comprehension, limited as it might be for us to comprehend the 'mind' of history and what to yet expect until all the wheat is separated from the chaff.
Animals/reptiles serve the same purposes in their base God given instincts.
Gen 1:2 is no exception. Here's Gen 1:2, "Now the earth was unformed and void, and darkness was upon the face of the deep; and the spirit of God hovered over the face of the waters." The Earth was something He made. Gen 1:31 "And God saw every thing that He had made, and, behold, it was very good. And there was evening and there was morning, the sixth day." Good in this case means success, as in good job, it's working just fine, as intended and those sentient rational creations created in the image of their creator, or less were free. The later good refers to a moral code and is the subject of the trees.
"Knowledge of what? What was this knowledge of 'good and evil' the second symbolic 'tree' knew?
Knowledge in this case refers to knowledge of the effects one's decisions and actions have. That requires some understanding, but not wisdom. The second tree was true wisdom, which requires more than understanding. That understanding is that the qualities of good and evil are determined based on referring to a moral code. That moral code is a set of rules which are engineered to protect rights. Rights are those things which inherently define and protect the existence of the essence of a sentient rational beings life.
"The devil was most certainly created 'good' and most beautiful as accounted for in Ezekiel 28, and it says that the king of Tyre was in the Garden of God, Eden. "
Ezekiel 28 refers to satan. Genesis is parable and just as Adam is a player in that parable, so too is satan. Every individual provides for and handles their own temptations according to their own decisions regarding values. Satan's "wisdom" is not wisdom, but the simple understanding(of the first tree) and a moral ocde that considers only one's own rights as worthy of protection, or some special group's rights, but not any others.
"This 'knowledge' originated with someone at a particular point in time after Genesis 1:1.
No. God had already determined what was good, evil, neutral and understood why actions had those qualities.
"When did the devil develop his narcissistic tendencies."
Probably started in childhood and became fully decided and ingrained as a teenager.