II Chronicles 31:4 Moreover he commanded the people that dwelt in Jerusalem to give the portion of the priests and the Levites, that they might be encouraged in the law of the LORD.
They gave to the priests and the Levites and this encouraged them in the Lord and in His law. As they ministered and served God the financial help given by the people made them realize that they were appreciated. They were able to do their work knowing that others saw the value in it.
As you give to help your pastor, the missionaries, the church staff they will know that you appreciate the work that they do. It is a good thing to let them know you believe in them. There is a great deal of pressure to believe that no one cares. It is most certainly that the devil would tempt and discourage but anything you can do to help them feel loved and appreciated will be a blessing.