More often than not after your studies you will be given a test or multiple tests to see if you had learned anything. Likewise what God has said to you will also be tested. A faith that cannot be tested cannot be trusted.
As Christians we do not walk by explanation, we walk by faith. God did not promise to explain everything to us. The things of God cannot always be explained; it can only be revealed. We have to believe what God said He will do.
God has a plan for each of us and He has special parameters around those plans; we only need to trust the Lord for it. “Confide in Jehovah with all thy heart, and lean not unto thine own intelligence” – Proverbs 3:5