^a valued characteristic = virtue
courtier, i think you are a shinning example of how knowledge itself is insufficient to realize one's higher capabilities, that other (virtues?) are necessary
you seem knowledgeable enough, or capable of obtaining knowledge when you want to, and yet you've shown unable to realize the great human abilities/achievements alluded to in the quote
in other words, i think in 'testing' that quote we need not look further than you
what is it about you that knowledge alone fails to deliver?
is it motivation?
you are motivated enough to obtain knowledge which is no easy task, but not motivated enough to apply it toward greater ends, 'real results'
once knowledge is had, what motivates humans to do great things?
desire for esteem?
power?
acquiring things?
making some impact on the world in the name of significance as alluded to earlier?
are these what define 'real results'?
maybe you already have what motivated others to apply their knowledge...
then question is then why do you still seek knowledge, apparently even in the absence of reward
you say you are lazy, but in a way you are actually the opposite, and are very capable of doing work when others would be ill motivated
i never read tons of books in my childhood, and many people only seek knowledge when they know they'll get a degree for it, or some other concrete reward
yet you have failed in these endeavors, yet have arguably amassed more knowledge than those who have sought it through these venues
and so you do have motivation and therefore potential to be actualized if you can apply it to other ends beyond knowledge acquisition itself
maybe it's just a vague sense of looking to fill a void in yourself, but not being convinced that the avenues available to you, that seem to work for others in moving them along life's milestones, will work for you; or getting sidetracked with distraction preventing longterm goal pursuit and staying with it
i guess it's about finding a path that works with the pattern of your motivation, the ups and downs so to speak; at what point do you become disinterested? well then it's finding something bares that point without breaking the path allowing yourself to continue on and stick with something
so you must find something with a particular pattern of activity that can sustain your interests; rather than being a matter of simple intensity or degree, it must conform to your pattern of cycle of interest so you don't derail, something that hugs your curves so to speak
or pattern of interest, rather than going against the grain which requires that you 'bite the bullet' at times when that is unlike you