If the heart wanders or is distracted, bring it back to the point quite gently -- and even if you do nothing during the whole of your prayer but bring your heart back, though it went away every time you brought it back, your time would be very well employed.
The wild goose is a Celtic symbol of the Holy Spirit. Geese in a flock have greater range and fly faster than single geese as they benefit from the lift of their wings. When the lead goose gets tired, it rotates back into formation and another flies at the point position. We fly in sacred community, interdependent with one another.