Let us give thanks to God continually. For, it is outrageous that when we enjoy His benefaction to us in deed every single day, we do not acknowledge the favor with so much as a word; and this, when the acknowledgment confers great benefit on us. He does not need anything of ours, but we stand in need of all things from Him.
In point of fact, thanksgiving adds nothing to Him, but it brings us closer to Him. For if, when we recall the benefactions of men, we are the more warmed by affection for them; much more, when we continually bring to mind the benefits of the Master towards us, shall we be more earnest with regard to His commandments.
For this cause Paul also said, Be ye thankful. For the best preservative of any benefaction is the remembrance of the benefaction, and a continual thanksgiving for it. (St. John Chrysostom)