Rabbi Nota Tzvi Frankel, the Alter ([Wise] Old Man) of the Slobodka Yeshiva, taught, "Do only good, for that is why you were created. But who needs to know about it?" In line with this teaching, we should try to do some act of kindness on a routine basis that remains unknown to others. We should let it remain a secret between us, the recipient of our kindness (if it is an act that cannot be done anonymously), and God.

Joseph Telushkin in A Code of Jewish Ethics: Volume 1