"V'anshei kodesh tihiyun li - men and women of holiness shall you be to Me" (Shemos 22:30)
"Ki am kadosh ato l'Hashem elokecha - for you are a holy people to Hashem, your God (Devarim 14:2)
My father, ztk"l, commented that an important perspective emerges from juxtaposing the two verse cited above. A Jew is inherently kadosh (holy) and is challenged to realize and actualize his kedusha (holiness) in two respects - as a member of the Jewish people (am kadosh) and as an individual (anshei kodesh). The collective, national aspect of kedusha does not blur the individualistic aspect.
Every Jew is blessed with Torah and mitzvos. Every Jew is obligated to observe all mitzvos pertaining to him/her. We all, without exception, belong to an am kadosh with the concomitant obligations of that blessing. Nevertheless, since "k'sheim shepartsufeihem shonim, kach dei'oseihem shonos - just as people's appearances differ, so too their spiritual temperaments differ" our individuality should be reflected within our avodas Hashem. The precise mix and blend of Torah, avodah (prayer) and gemilus chasadim (acts of kindness) will reflect the individuality of one's neshama. Even within Torah or gemilus chasadim, for example, one's individuality will be discernable. One talmid chacham will make his mark as a baal machashava (philosopher), yet another as a baal halacha, etc. Similarly within the realm of gemilus chasadim. One person may find himself/herself especially suited to shadchanus (matchmaking), another to helping poor people, etc.
The beauty and strength of the Jewish people as an am kadosh issues in no small measure from the individuality of its anshei kodesh.