Fate of Evergreen Fig Tree

Bible records an incident in which Jesus curses a Fig tree and it withers from the roots. Mark11: 12,13 14,15, 20  says 12 … Jesus was hungry. 13 Seeing in the distance a fig tree in leaf, he went to find out if it had any fruit. When he reached it, he found nothing but leaves, because it was not the season for figs. 14 Then he said to the tree, “May no one ever eat fruit from you again.” And his disciples heard him say it. 20 In the morning, as they went along, they saw the fig tree withered from the roots.
 I am not sure how many of us have taken seriously the divine message   underlined in the above incident recorded in gospels.  It is strong warning against our contrived spirituality. Seeing from a distance the fig tree  has an illusory appearance, it is full of leaves,  tantalizing people to think it is full of fruits and attracting people towards it but a close look reveal it has nothing but leaves. It is the same story with many who think or pretend to be spiritual. With many of us the spirituality is only superficial, we do present an outward look of being pious, spiritual , humble, honest and so on in  our externals , in words, postures, look , saintly attire and  smirk but  god who take a close look  find that the so called spiritualists  are just the opposite and empty in fruits like this fig tree in this incident or the fruits it bears  could be even harmful .
It is impossible to think that Jesus did not know that the tree in questions had no fruits. Then why he did this and why it is  recorded in bible in all the gospels. I believe it is  to teach an important lesson to the world, to send a strong warning  against bogus spirituality.
Evergreen fig tree is like a parasite, it is green even when other trees are dry or leafless , means such people  suck and enjoy on the  scarce resources to feed themselves even  when others around are starving. It represents a wolf camouflaged in a sheep’s cloak, it is like Satan appearing as an angel’s gaze, it is like fake shepherd who come to steal and devour the sheep, it represent false apostles and workers to distract  the faithful by their distorting doctrines. 
That is why Jesus warned his people to be watchful and discern the tree (people) by the fruits(acts) and judge  not by appearance.
When  the disciples came to Jesus  and asked, “Do you know that the Pharisees were offended when they heard this?”
  He replied, “Every plant that my heavenly Father has not planted will be pulled up by the roots. 14 Leave them; they are blind guides. If the blind lead the blind, both will fall into a pit.”
Sajan 
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