And A Nose Ring, Too

בס"ד
When Eliezer decides that Rivka meets his criteria for Yitzchak he bestows upon her two lavish gifts: a nose ring and a pair of bracelets. Chazal point out that these symbolize the half shekel coin that the Jews would give in a census and the ten commandments, respectively.
Understood is the significance of ten with the bracelets, two items each weighing five "selah", as the ten commandments. Telling Rivka that her children will merit receiving these from the hand of G-d is certainly something Eliezer might do. One might ask, however, why was the mitzvah of machatzis hashekel worthy of being represented in these gifts ?
To answer, the Kli Yakar points out that the Luchos HaBris had to come in two installments. The first time around they were given with great pomp and ceremony – thus inviting the negative effects of "ayin hara." Take two, however, were given in a discreet fashion – which is why they survived.
Rivka was destined for great things, and her magnanimous nature had already been established. What Eliezer had to do now was find a way to safeguard it. This is where the half shekel comes in.
When the Jewish people are counted – the "ayin hara" can take effect. (Over)Simply put, when we broadcast loud and clear any positive item – the forces of evil can't resist and redouble their efforts at destroying it. To escape this, Hashem commands them to take a census using the half shekel.
So when Eliezer gives Rivka her two gifts he is, in effect, saying – "Your children will be great, but let's just keep that to ourselves and be discreet about it."
(One can clearly contrast with Lavan who blesses his sister with far reaching blessings upon her departure.)
We can learn an important lesson from this. Good deeds are, perhaps, most prone to being over broadcast and hoisted up upon pedestals for all to see. Now, we should be proud of our kindnesses, but at the same time, we should realize the need and propriety of discretion.
May we, in the merit of our good deeds and subtlety in performing them, be privileged to once again behold the Aron Hakodesh, where the whole and broken Luchos reside.

Hatzlacha !