As I was searching Ether 1-3, the greatest witness that the brother of Jared received was in seeing Christ and how He had a body like unto man but in spirit form. He did not receive that witness until after he prayed and worked for that witness. I noticed a theme throughout those three chapters that the Jaredites overall movement, spiritually and temporally, was governed by their diligence and humility to pray and seek for the counsels of the Lord. The brother of Jared, when trying to know how to light the barges, pondered diligently on his own before he asked the Lord what his answer was. The Lord trusted him enough to come up with his own ideas and knowledge. For that work and great prayer, he was not only blessed to have light in the barges, but he was also able to have the veil lifted from his eyes.
We too can know the mysteries of God if we prayerfully act in faith and live our lives according to D&C 58:26-28. We must be anxiously engaged in a good cause and bring to pass much righteousness. The Lord does not start working with us until we start working. I leave my testimony with you in the name of Jesus Christ amen.