I imagine that in the culture of Jesus’ day many things were different. The more that Jesus reveals about the state and the heart of the people, the more I am convinced that many things were also the same.
People still make a big deal about giving, they seem to want everybody around to know just how wonderful they are and even just how much they have been giving. In the midst of pleadges and money lines, throwing money at the preacher and giving with a particular return or reward as a benefit Jesus reminds us to keep the secret.
Guard the secret even, don’t let the ones closest to you know what you are going for the sake of glory. If you choose to, remember the moment well because that’s all you get.