Richard Foster in his book "Prayer: Finding the Hearts True Home", says that intercession is a way of loving others. Intercessory prayer is selfless prayer, even self-giving prayer.
"Intercessory prayer is priestly ministry, and one of the most challenging teachings in the New Testament is the universal priesthood of all Christians. As priests, appointed and anointed by God, we have the honour of going before the Most High on behalf of others. This is not optional; it is a sacred obligation - and a precious privilege - of all who take up the yoke of Christ."
Richard Foster, "Prayer: Finding the Hearts True Home." HarperCollins Publishers. 1992 page 191.