If you treat an individual as he is, he will remain how he is. But if you treat him as if he were what he ought to be and could be, he will become wh… - Johann Wolfgang von Goethe

Treat people as if they were what they ought to be and you help them to become what they are capable of being.

I'm gazing at church and palace, ruin and column,
Like a serious man making sensible use of a journey,
But soon it will happen, and all will be one vast temple,
Love's temple, receiving its new initiate.
Though you're a whole world, Rome, still, without Love,
The world isn't the world, and Rome can't be Rome.

When you see some evil you proceed to immediate action, you make an immediate attack to cure the symptom.

Treat people as if they were what they ought to be and you help them to become what they are capable of being.