Iron Butterfly - In-A-Gadda-da-Vida Lyrics Meaning

When Doug Ingle (keyboard, songwriter) wrote the song he was quite intoxicated.
The next morning he told Ron Bushy (base player, lead vocalist) that he (Doug) had written a new son. Ron inquired what the title was. Doug seemed to resist telling Ron the information he asked for. After several minutes of no response, Ron said something to the effect of, "I'm in this group, we share our ideas. Why in the f---
won't you tell me the title to the f----- song? Doug blurted out, "In-na-gadda da vida."Ron responded, "What the h--- does that mean?" Doug responded,"In the garden of life." Ron quipped, "Sounds cool! Can't wait to hear it!" Doug later shared with a producer that he didn't have a title and blurted out that response to get Ron off of his back. (This story is on the jacket of the In A Gadda da vida CD or the greatest hits CD.)