Begin to be now what you will be hereafter.
Never complain and never explain.
Go for it now. The future is promised to no one.
To know oneself, one should assert oneself.
Without hard work, nothing grows but weeds.
Things do not happen. Things are made to happen.
Problems are not stop signs, they are guidelines.
Be kind whenever possible. It is always possible.
Be thine own palace, or the world's thy jail.
If you're going through hell, keep going.
There are simply more young people than there ever were. You get this feeling of strength. Also, large numbers can be a drawback, making it difficult to lose one's anonymity.
Teenagers today are more free to be themselves and to accept themselves.