Having God is necessary and very simple. Who does not have their roots in the Lord and does not even ask for it, will never test the Living Water.
Whomever has thirst, and knows that he has it, but does nothing, continues being thirsty. On the other hand, whomever has thirst for the Lord and asks this grace with total confidence in God, instead of the cup, he will be satisfied with a fountain that never is going to cease flowing from inside.
This is the secret! It is this way that we learn to remain in God.
Ricardo Sá