The Apostle Paul lived in the green-light district of the Gospel. He didn't need signs in the heavens to convince Him to obey the Scriptures. When Jesus said, "Go!" that was enough.
"Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them....." - Matthew 28:19,20
Many believers are unwilling to take any new risks or to stretch beyond the known comfort of the church to take the love of God to those who know nothing of it.
God requires to be represented by a fiery church, or He is not in any proper sense, represented at all. God, himself, is all on fire, and his church, if it is to be like him, must also be at white heat.
"The voice of the Lord flashes forth flames of fire." Psalm 29:7
The "sound" of your Godly calling (DESTINY) should be nothing less than the driving force behind how you live your entire life.
If the things to which you feel called do not require spiritual resources as well as natural labor, then perhaps you aren't fulfilling your call to its full potential.