Common sense is necessary in the path of attainment, but not to such an extent that the reason should dominate and lead the will. The will, in action, must lead the reason, whereas if the reason is allowed to lead the will, the will many times becomes paralyzed. But when in cooperation the will leads the reason, then the path of attainment becomes illuminated.
"Githa I, Sadhana 5", by Hazrat Inayat Khan (unpublished)
Reason is learned from the ever changing world, but wisdom comes from the essence of life.