The Torah teaches us about a certain type of Jew. A Jew who desires to rise to a greater level of holiness and so he refrains from some of the indulgences of the average man. This is the Nazir.
While the term Nazir is used to refer to his abstinence from wine [see Bamidbar 6:3] strictly speaking, the title is derived from the word for a crown ("Nezer").
An interesting attribute of a crown is that it is seen by all as a sign of majesty. But it is not seen at all by the wearer. All who see the crown marvel at it's beauty. Only the one wearing it feels it's weight.
This is the point of the Nazir. His avodas Hashem is extremely public. He must avoid any product that came in contact with wine and he may not attend any funerals ( even his own parents !) He may not shave or take a haircut and so he is certainly visible to all as someone who is taking extreme pains to promote his holiness.
This type of divine service carries with it a danger. The danger of the crown. It is the weight of the crown that keeps the wearer from losing his head. A certain sense of grounding and stability are necessary to embody what the crown represents. The same is true of the Nazir.
A nazir must not enter into his Nazirite contract with a flippant heart or a desire for public displays of piousness. This is why Hashem reminds him of this by referring to his status as a "crowned one".
And what of us ? We no longer accept upon ourselves the nazirite contract. But the message of the contract is still imminently applicable. Yes, our actions are visible to the outside world and our pious practices do shine. But we must feel their weight and responsibility in order to shoulder them properly.
So, for whom does the crown shine ? It shines for thee.Hatzlacha !!