It's always too early to quit.
Either you run the day or the day runs you.
Do not weep do not wax indignant. Understand.
The most effective way to do it, is to do it.
If you think you can do it, you can.
Go for it now. The future is promised to no one.
Quality is not an act, it is a habit.
Never complain and never explain.
Who seeks shall find.
You never know what motivates you.
Though I had success in my research both when I was mad and when I was not, eventually I felt that my work would be better respected if I thought and acted like a 'normal' person.