Psalm 115:11-13 ~ The Amplified Bible

You who [reverently] fear the Lord, trust in and  lean on the Lord! He is their Help and their Shield. The Lord has been mindful of us, He will bless us: He will bless the house of Israel, He will bless the house of Aaron [the priesthood],

 He will bless those who reverently and worshipfully fear the Lord, both small and great.  To fear the Lord means to stand in awe with respect and reverence. Fearing Him involves coming into His presence with hearts of gratitude of His awesome greatness.  We can't possibly understand everything about Him, but as we worshipfully fear and seek Him, He will piece by piece reveal Himself to our hearts. This blessing is what He promises to those who worship Him. He fills us with His presence and changes us from the inside out.  Glory to His holy name!