Make not your Pledges rashly, unthinkingly or emotionally or they will be short-lived. They will disappear after the inspiration of the moment dissolves.
Pledge not to do things you know you have not been able to do in the past unless you are certain that you will do your utmost to fulfill it even if you have to pay a very heavy price for doing it, or you will be setting yourself up for failure. (STQ-2012-p29,31)