Osho

 Don't become the mood, remain a watcher because the watcher always knows the other is coming, following. Soon you will see the day is disappearing and the night is coming. Remain a watcher.

When you have become sad, again go on watching. As the day has passed, the night will also pass, everything passes.

After a few alert moments you will remember that you are completely separate - you are neither, neither this nor that.

This is how for the first time you will feel blissful. Now you know unhappiness cannot disturb you, and happiness cannot disturb you. You have attained to an imperturbable state, the state of bliss. That is the goal of all buddhas.