Righteousness shall go before him ; and shall set us in the way of his steps [Psalm 85:13 KJV]
Righteousness shall go before Him and shall make a way for His footsteps. [Psalm 85:13 YLT]
Malachi says 'Behold, I will send my messenger, and he shall prepare the way before me', 3:1, and Mark applies this to John the Baptist, altering the pronoun of the Septuagint (following Jesus who, first, did the same - Matthew 11:10) expressing 'thee' not 'me' and thus expressing further revelation regarding Deity.
The beginning of the gospel of Jesus Christ, the Son of God; As it is written in the prophets, Behold, I send my messenger before thy face, which shall prepare thy way before thee. [Mark 1:1,2 KJV]
Thus, before Jesus comes, as the Messenger of the Covenant (Mal 3:2), there comes one under whose ministrations the soul is prepared :
Every valley shall be exalted, and every mountain and hill shall be made low: and the crooked shall be made straight, and the rough places plain: [Isaiah 40:4 KJV] [also Luke 3:5]
Is the 'righteousness' referred to in Psalm 85:13, the rightness of the baptism of repentance which is a preparatory necessity (as seen in the figure of the parable of the sower in Mathew, Mark and Luke and in the reality expressed by John in John 1-3) prior to faith ?
Does the Hebrew bear that sense and meaning ?