Have you ever heard someone say, "People with good intentions make promises, but people with integrity keep them"? You probably have ran across or even have experienced a relationship, friendship or otherwise, where someone is great at making promises. They are always willing to do as you ask and seem to just know the right things to say...but at the end of the day somehow those promises do not come into fruition.
Commitment means staying true to what you said you were going to do, long after the mood you said it in is gone. You might be under pressure in front of your boss or maybe you're in a situation where you feel the message is to agree or volunteer to get something done. I get it, I've been there too. The biggest difference would be that whether I was pressured or not, if I said I was going to do something then I did.
If we give someone our "word" then it has to be more than just a construct of words and phrases that comes out of our mouth. Our "word" is the energy we create in everything we do. When we are talking about our "word" that includes our emotions, physical actions, thoughts and our attitude. If we think it, then we can say it, and if we say it then it can come to pass.
When we give someone our "word", we should ensure it is full of compassion. It comes from your sense of integrity, filled with love and honesty. Most importantly it has to reflect a blameless rapport with others. Words are powerful. Words can rebuild someone or break them down. We shouldn't take our power over words lightly.
Remember, you are what you do, not what you SAY you'll do. There is a huge difference.