To know oneself, one should assert oneself.
Who seeks shall find.
If you think you can do it, you can.
Quality is not an act, it is a habit.
I can, therefore I am.
Leap, and the net will appear.
Be gentle to all and stern with yourself.
Wherever you are - be all there.
If you're going through hell, keep going.
By failing to prepare, you are preparing to fail.
Sometimes they are a matter of luck the photographer could not expect or hope for them. Sometimes they are a matter of patience, waiting for an effect to be repeated that he has seen and lost or for one that he anticipates.