...for God's gifts and his call are irrevocable (Romans 11:29).
It is dangerous to align your calling and your vocation as dependant on each other. God calls you and me into relationship with Him. That is our foremost calling. It is from this relationship that our "physical" calling results. Whether that is to be a teacher, a stockbroker, a nurse, a pastor, or any number of vocations, we must realize that when He calls us, the change in vocation never changes His call on our lives. It is a mere change in the landscape of our calling. This is why it is dangerous to associate our purpose and calling too closely with our work. When we define our work life exclusively as our calling, we fall into the trap of our identity being locked up in our vocation. This promotes aspiration because of a need to gain greater self worth through what we do.
Os Guinness, author of The Call, describes the great artist, Picasso, who fell into this trap.
"'When a man knows how to do something,' Pablo Picasso told a friend, 'he ceases being a man when he stops doing it.' The result was a driven man. Picasso's gift, once idolized, held him in thrall. Every empty canvass was an affront to his creativity. Like an addict, he made work his source of satisfaction only to find himself dissatisfied. 'I have only one thought: work,' Picasso said toward the end of his life, when neither his family nor his friends could help him relax."
Friend, what happens when you lose your job? Do you lose your calling? Do you lose your identity? Do you lose your sense of well-being? No. Calling involves different stages and experiences in life. Disruptions in our work are an important training ground for God to fulfill all aspects of his calling upon your life. Trust in your God who says our calling is irrevocable and that all things come from Him.
Footnote: Os Guinness, The Call, Word Publishing, p. 242