'One night at three in the morning I woke up suddenly and then I talked to someone' Zidane tells French magazine France Football in an interview to be released on Tuesday.
'It's a mystery don't try you will not find (who that person was)' he added.
'It's somebody you will probably never meet. I can't explain that encounter myself.
'That person really exists but it all comes from very far. And then during the hours that followed I took the decision to come back'.
Zidane decided last week to resume playing for France to help them in their struggle to qualify for the 2006 World Cup.
The three-times World Player of the Year who won the World Cup in 1998 and the European championship two years later had announced his retirement from international football after Euro 2004.
The 33-year-old's comeback decision came as surprise after he had said several times over the past few months that he would not change his mind.
'I was dumbfounded before that force that was guiding my behaviour and I had something of a revelation' Zidane told France Football.
'I suddenly wanted to go back to the roots to my debut in professional football when I was nobody when nobody knew me and when I could quietly learn my trade and grow up.
'I felt like recapturing all that and an irrepressible force seized me then. I had to obey to that voice that was giving me advice'.
Chelsea midfielder Claude Makelele and Juventus defender Lilian Thuram have also decided to play for France again. Along with Zidane they are expected to play in a friendly against Ivory Coast on August 17 in Montpellier and then in two World Cup qualifiers next month.