“ Never forget what you are, for surely the world will not. Make it your strength. Then it can never be your weakness. Armour yourself in it, and it will never be used to hurt you. ”
Source: A Game of Thrones
Similar Quotes
It's not that you should never love something so much that it can control you. It's that you need to love something that much so you can never be controlled. It's not a weakness. It's your best strength. 
For one moment if you forget that you are mortal, ignorance will sprout, if you forget for a long time, it will bear fruit. 
Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen. 
If you are distressed by anything external, the pain is not due to the thing itself, but to your estimate of it; and this you have the power to revoke at any moment. 