well, you see God calls each of us for a special work, some to be singers, some to be teachers, some to be preachers, some to pray, and some to witness. God gives us talents and abilities that we should use for His Glory. Like the talent to sing, or play an instrument. Or even the ability to teach, or even to be able to work the sound system, or clean the church, or just pray for people. God calls each of us differently and for different purposes.
My personal testimony in this case is this.
I had been saved for a while, when I felt that God had a purpose for my life. I prayed a lot, studied His word, and sought His divine guidance. Then one day I felt in my heart as if God wanted me to preach His word. well honestly, that scared the bajeebies out of me. so I tried to teach sunday school, and sing in the choir, but I never could get rid of that gnawing feeling between my heart and stomach that I should be preaching. I tried to get out of it for about 3 or 4 months and I tried every excuse that I could fathom. I'm not smart enough, or old enough, or well educated enough, or bold enough...etc. But when you don't do what God tells you to do, you get in trouble, and I did. Church was not enjoyable, nor was any form of Christian music. I couldn't even read my Bible without that feeling tearing me up inside. I finally submitted to God's will and announced my calling to preach the following Sunday.( I have never been to seminary, nor Bible college, I rely wholly on God to provide me with wisdom, insight and understanding through studying His word and praying about everything. He has never failed me nor left me. )
Since then I have been preaching in my church, other churches, and even on my college campus. On that campus I have been spit at, had garbage thrown at me, been cursed at non-stop, been mocked, belittled, and verbally abused.
But no matter how I feel, or what happens I feel lead to preach and spread God's Holy Word. It is a tangible feeling within my being that God has called me to this work and has provided means and opportunity to do so. Yes, I have been discouraged, but I've never given up on God because He never gave up on me.
I hope that clarifies a bit.