How and when one comes to know gods will for his life is not spelled out anywhere in words, and we canít just read the Bible And know. However once we accept Christ as our savior.(the starting point) We learn to live in tune with God and become sensitive to his ownership. Then when the call comes the heart is ready to receive and respond to it.
I look upon ,my family and friends, early experiences as influences that led me to a time of commitment and a higher calling on my life because they where Christians. I couldnít possibly know all I would encounter and come to know and love, before I finally knew without a doubt, that God wanted me to be an Evangelist and start Churches.
It was through the years of going to church and school where I meet people with spiritual needs, That God led me step by step to prepare me for what hen had called me to do. My family never understood my call or my commitment to it. They believed I should serve god and the people in the church at our home town, help the pastor and teach Sunday school and that was all, my other duty was to the family business.
However family and friends werenít responsible for my call. They didnít know what god was leading me to do.
I learned early on that I am accountable to God alone, and I serve him in that realization wherever he leads me. God continually blessed me with people and opportunities that increased my awareness of the spiritual needs of our nation. My call was to help meet that need, by sharing Christ and start churches.
" and we canít just read the Bible And know" you said.
Risky and troubled waters, to be sure.
"Thy word is a lamp unto my feet and a light unto my path" The Psalmist tells you and I and to say otherwise, though I understand your reasoning, is oftentimes a house built on sand.
It leaves all truth as RELATIVE and allow me a point of clarification here; I've said before to trust the heart Jesus lives in-YOURS, although I do that, I know that what comes from my heart is IN THE WORD, or else what is in my heart is RELATIVE to me. If my heart is the only source then there is no ABSOLUTE truth, but only truth that I can perceive, receive and believe. Dangerous place to live and walk.
I don't usually critique content; but this is a topic I believe I cannot leave unaddressed.
Although I might understand your premise; keep in mind that there will be believers much younger in the faith that will take this to the extreme and while running with it, hurt themselves.