Aleph. Blessed are those whose ways are blameless, who walk according to the law of the LORD. (NIV)
BLESSED (HAPPY, fortunate, to be envied) are the undefiled (the upright, truly sincere, and blameless) in the way [of the revealed will of God], who walk (order their conduct and conversation) in the law of the Lord (the whole of God's revealed will). (AMP)
Blessed are the undefiled in the way, who walk in the law of the LORD. (KJV)