The Rebbe writes (hayom yom) that a shliach is one who does...one who acts ...
a shliach is not born with any talents or gifts necessarily but what they are born with is a deep desire to better the world...the words of the rebbe are heard by many yet it is he shliach who is touched by them and moved to act upon them....
the rebbe's strategy was/is brilliant and yet so simple take the average person- you or I- and charge them with raising the consciousness of the world...
on average most people only care about events that effect them directly...
people may be killed ...starving...g-d forbid etc. Jews may be intermarrying and or being lost yet it does not matter to them..
along comes the rebbe and says lets create mass inspiration using average people who care or who wished they cared and send them amongst the masses in order to arouse them to care as well.
moashiach will come when the consciousness of the world is raised at least to the point that people are aware of each other..
interesting but not surprising the shliach somehow grows into the shlichus mission.. he might have not started as a scholar, states man, director, author, teacher, administrator, fundraiser or even a perfect chosid.. etc. etc but he becomes one . he becomes what ever it is the shlichus needs and demands
i remember being in yeshiva on shlichus. where the seder was in the winter months that on motzie shabbat the bochurim would say a pilpul for the zal....the joke amongst our selves was that ..."the balie nigla said in nigla..the balie chasidus said in chasidus and the one who knew neither said in both". why because he was not limited only to his abilities but did what was demanded of him.
the end will be that we will all become shluchim because we are already shluchim..when our souls left heaven and where sent to come upon the earth it was in order to fulfill the mission of g-d to create a dwelling place and temple for g-d on the earth...
the only difference between the appointed shluchim and the not yet appointed ones are that
the former must arouse the latter to realize his /her full potential and shlichus. amen