This is about the way that different animals communicate with each other. How does a lamb know it's mother in the crowd of hundreds of other ewes? The mother has a specific CALL, just for her baby. How does the male seal find it's mate in amongst hundreds of other seals that look exactly alike that are scattered along the shore? A CALL. It is meant for only one, and only that one can answer that call. If another lamb, tried to approach the ewe the mother would reject it. ----as would the bull seal reject another female.
You and I have a CALL that only you and I were meant to answer. No one else can fulfill that CALL. So, you better go answer it!