Others, who have the common amount of charity and have not yet grown in grace to this extent, but are guided by their own reason, struggle and strive all day against their sins in order to acquire virtues. Like wrestlers, they are sometimes on top, and sometimes underneath. Such people are doing well. They acquire virtues through their own reason and will, but not because they love and delight in virtue, for they have to exert all of their energy to overcome their natural instincts in order to possess them. Consequently they never enjoy true peace or final victory. They will receive a great reward, but they are not yet sufficiently humble. They have not yet put themselves wholly into God's hands, because they do not yet see Him.
Book II, ch. 36 (p. 211) - The Ladder of Perfection (1494)