The singular Hebrew word for man (ish) is used here to portray a representative example of a godly person; see Preface

This has been called “The Preface Psalm” because in some respects it may be considered “the text upon which the whole of the Psalms make up a divine sermon.” It opens with a benediction, “Blessed,” as does our Lord’s Sermon on the Mount (Matt. 5:3).

Both of these footnotes are for Psalm 1:1 and there are good instructions from both the ESV and the AMPC.

The second example is from the AMPC and gives the preface, the ESV only make note of it and does not quote the preface.

We are blessed to have multiple versions of God’s Word to study and we all have our personal favorites to read for different reasons. The discovery of these differences in footnotes came about because of a curiosity of wording. So often we read another bible version as it is quoted to us from a friend or study group. Do we know our own versions well enough to be curious about variations?

This may be one of the ways that the Holy Spirit speaks to us. His ability to bring into remembrance what we have read and placed in the library of our minds is certainly biblical truth. (John 16:13) It is also possible that in noticing the variation in text is an encouragement to investigate further. What was it Moses said in Exodus 3:3 “I will now turn aside, and see…”

Our days are filled with concerns and responsibilities but in our quiet time, in the time we have set aside “habitually” (AMPC wording again), we can surely turn aside to see what marvelous sights the Word has to offer.

Thousands of learned men, dedicated to God, have spent a lifetime in preparing footnotes and commentaries and definitions just for our edification. It would take a lifetime to read them all, but only a moment to answer the Holy Spirit’s nudge on any particular one.