When God called Abraham out of the land of Ur of the Chaldeans, he had no clear directive about the land to which he was going. It took a great deal of faith for him to go to a strange land. Abraham had nothing to rely on except God’s clear command to go.
God seldom gives us reasons and explanations, but He does give us promises to hold on to. Do you trust God? When you know God wants you to do something, would you step out in faith, even though He hasn’t given you reasons why? Will you be obedient to His call? Will you trust in the Lord with all your heart and lean not on your own understanding?
Commit your way to the LORD, trust also in Him, and He shall bring it to pass. - Psalm 37:5