Turkish poet Rumi says:
What is poison?
Anything which is more than our necessity is poison.
It may be power, wealth, hunger, ego, greed, laziness, love, ambition, hate or anything.
What is fear?
Non-acceptance of uncertainty.
If we accept that uncertainty, it becomes adventure.
What is envy?
Non-acceptance of good in others. If we accept that good, it becomes inspiration.
What is anger?
Non-acceptance of things which are beyond our control. If we accept, it becomes tolerance.
What is hatred?
Non-acceptance of person as he is. If we accept person unconditionally, it becomes love.