The term purpose is c. 1300, purpus, "intention, aim, goal; object to be kept in view; proper function for which something exists," from Anglo-French purpos, Old French porpos "an aim, intention" (12c.), from porposer "to put forth," from por- "forth" (from a variant of Latin pro- "forth;" see pur-) + Old French poser "to put, place." 

What objects do you keep in view? Where is your aim? Revenue? Margins? Velocity? Return on Assets? Market? Customer? Competitors? Opportunities? Health? Family? There are many objects with a purpose. Finding a purpose is the difficult part. 

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 Open anywhere, commence on a new journey, trodden on a path