Necessary, Possible, Impossible

We've all heard the saying, "Practice makes perfect."

I'm not sure about perfect, but I do believe if I want to learn something new, 

or establish a new habit, 

I need to do it, not just talk about it.

If I want to understand something, I may need to read it several times.

If I want to write well, I need to write a lot.

If I want to run a marathon, I need to train on a regular basis.

If I want to change how I eat, I need to pay attention to what I put in my mouth.

Do the necessary-do the possible-do the impossible.