Be gentle to all and stern with yourself.

What you do today can improve all your tomorrows.

Be thine own palace, or the world's thy jail.

If you think you can do it, you can.

The wise does at once what the fool does at last.

Know or listen to those who know.

It's always too early to quit.

To know oneself, one should assert oneself.

Without hard work, nothing grows but weeds.