The faith that would be trusted must be tested. God is looking for men to trust, but before He commits Himself to man, He must first prove that nothing is more valuable to such above Him.
Although many people followed the Lord Jesus during His earthly ministry Jesus could not commit Himself to them because He knew their hearts (John 2:24-25). They were not following the Lord because they loved God but because of what they wanted to get. Some followed Christ because of bread, others because of miracles, others just to watch a show. Such men can not be trusted with the kingdom values, hence they could not earn God’s committed trust.