One must have noticed that the oft used pronoun is "you" especially to shift the onus from oneself. Therefore, the choice for the human trait desirable fell naturally onto "upright". Marcus Aurelius laid out the principle crisply:
A man should be upright, not be kept upright
To answer the question as to with dreams shattered whether one can be upright, Mehmet Murat Ildan said,
The greatest victory for man is
not
that his dreams were fulfilled
but
it is that to stand upright
even
when none of his dreams are fulfilled
As though to goad us to be upright Israelmore Ayivor decreed
The table that cannot stand upright
is
an insult to the carpenter who makes it
This makes it clear that we become responsible even for the acts of the persons whom we mentor
Confucius, the great teacher laid out the truth in saying
Man is born with uprightness.
If one loses it,
he will be lucky
if he escapes with his life
Contrast these with the warning of Chanakya
Do not be very upright in your dealings
for you would see by going to the forest
that
straight trees are cut down
while
crooked ones are left standing
Thus, the value of being upright as well as its pitfalls if not being reasoned has been brought out by the wise men.