If you give to others, you will be given a full amount in return. It will be packed down, shaken together, and spilling over into your lap. The way you treat others is the way you will be treated.
So I have decided to ask Titus and the others to spend some time with you before I arrive. This way they can arrange to collect the money you have promised. Then you will have the chance to give because you want to, and not because you feel forced to.
God is always fair. He will remember how you helped his people in the past and how you are still helping them. You belong to God, and he won't forget the love you have shown his people.