I can go days without eating if I don't think about food. Your mind, to protect itself, learns not to pay attention to that hunger feeling.
God guard me from those thoughts men think In the mind alone.
The mind is not, I know, a highway, but a temple, and its doors should not be carelessly left open.
We should treat our minds, that is, ourselves, as innocent and ingenuous children, whose guardians we are, and be careful what objects and what subjects we thrust on their attention.
In dreams the mind is constantly giving you substitutes just to protect sleep. And the same is happening while you are awake. The mind is giving you substitutes just to protect your sanity; otherwise you will be scattered in fragments.
Vigilantly guard your mind against erroneous and destructive thought as you would guard your house against burglars and assassins.
I don't spend too much time on social media, so I can protect my mind space.
At the beginning of every winter people are careful to install storm windows. These extra panes of glass protect their houses against the bitter winds. We do something very similar to protect our minds through the practice of meditation.