A weed grew in a garden full of vegetables. The weed saw how much the farmer loved the vegetables. The weed hated them.
The weed grew and grew so it could overcome the other plants. It intertwined its vines and established new roots of new weeds to grow and take all the water and sun away from the food-bearing plants.
The weeds grew throughout the garden. The vegetables stopped growing.
The farmer returned. He saw the weeds and was shocked with how fast they had grown, he took a shovel and a knife and cut the roots of all the weeds in the garden.
Meanwhile, there were weeds in the fields outside of the garden. They grew alone without any food-bearing plants around them.
They looked at the weeds in the garden and felt pity for them. They let the vegetables grow and found other places to get their sun and water instead.
The Fifth Commandment: You shall not kill.