You shouldn’t be surprised if there comes a time when you feel anxious as hell.
You shouldn’t be surprised when you find yourself overwhelmed by doubt.
You shouldn’t be surprised when you suddenly realize that you don’t know yourself.
Because they are parts of life, besides happiness, certainty and assurance.
Like coin, life also has two different sides: tail and head.
You’ll encounter those kinds of moments from time to time. That’s inevitable and worrying is not necessary because:
THIS TOO SHALL PASS
And if you’re lucky, you’ll find yourself in this situation:
The feelings of desperation and unhappiness are more useful to an artist than the feeling of contentment, because desperation and unhappiness stretch your whole sensibility.
Francis Bacon, via Brain Pickings.