Testify means to tell or give in account as to what you saw or know. I know this testifying of the goodness of Almighty God blesses others. Once we have him and decide to go all the way for and with him, it causes us to talk, talk, talk, about the things he has done, doing, and can do. With him all things are possible. The first step is to try him for yourself and never lose patience. Without patience we wont ever get to know God for ourselves we will hear about him yet, we are not able to testify.