SP 81 - Do not fear the effort and pain of the path of purification. Your openness to it is the only condition for uniting with Me and being enriched by Me. Sanctity is determined by accepting the path of purification that I lead. There are few saints because few want to accept the effort and suffering of purification.
So many stop at small graces because they run away from the way of the cross leading to sanctity: from internal and external sufferings, which are the crucible that melts the gold.