John Wesley's Rule

My dear wise John Wesley guru professor from Duke Divinity School (Dr. Richard Heitzenrater) says that there's no proof Methodism's father John Wesley actually ever said this, but it is attributed to him nonetheless, and I really like it:

Do all the good you can,
By all the means you can,
In all the ways you can,
In all the places you can,
At all the times you can,
To all the people you can,
As long as ever you can.

Think what the world would be like if we all took this rule to heart...