The Gaddulabaddhasutta
Here the Buddha tries to get across the time scales involved in our journey through Samsara and the pointlessness of our existence if we do not follow his teachings on the Noble Eightfold Path.
Life is pretty mundane and full of despair without the hope of escape from Samsara, it goes round and round and round, like a dog on a leash. There is no hope for escape without us realising this round of existence and taking a firm and devoted stance against what causes Samsara to control us.
Please read this Sutta and take it to heart.
May you all live without fear.