If you think you can do it, you can.
To know oneself, one should assert oneself.
It's always too early to quit.
Be kind whenever possible. It is always possible.
Leap, and the net will appear.
Expect problems and eat them for breakfast.
By failing to prepare, you are preparing to fail.
Problems are not stop signs, they are guidelines.
I can, therefore I am.
Things do not happen. Things are made to happen.
It frequently happens that two persons, reasoning right on a mechanical subject, think alike and invent the same thing without any communication with each other.