Promise

“The best way to find out if you can trust somebody
is to trust them.” 

Ernest Hemingway

Do what you say you  will do

When you say you will do it

Better than anyone thought it could be done

And people will trust you

But more importantly-

You will trust yourself

And that's poetiquejustis

But above all, my brethren, do not swear, either by heaven or by earth or with any other oath; but your yes is to be yes, and your no, no, so that you may not fall under judgment.

James 5:12