Integrity
Doing what you said you would do is simply an issue of integrity. (Charles Swindoll, pastor and author)
They used to say, “A man’s word is his bond.” That, and maybe a handshake, were all that was necessary for a verbal contract, an agreement between two honest people. Swindoll writes further, “There is no substitute for having the guts to keep your word.” Today’s culture, however, almost demands a carefully worded contract, drafted by lawyers. How sad!
All you need to say is simply ‘Yes’ or ‘No’; anything beyond this comes from the evil one (Matthew 5:37).