Horatius Bonar: Not the quantity or quality of faith, but the object -- the person and work of Christ -- is our ground for righteousness before God

"The strength or kind of faith required is nowhere stated. The Holy Spirit has said nothing as to quantity or quality, on which so many dwell, and over which they stumble, remaining all their days in darkness and uncertainty. It is simply in believing -- feeble as our faith may be -- that we are invested with this righteousness. For faith is no work, nor merit, nor effort; but the cessation from all these, and the acceptance in place of them of what another has done -- done completely, and forever. The simplest, feeblest faith suffices; for it is not the excellence of our act of faith that does aught for us, but the excellence of Him who suffered for sin, the just for the unjust, that He might bring us to God. His perfection suffices to cover not only that which is imperfect in our characters and lives, but that which is imperfect in our faith, when we believe on His name." (Horatius Bonar, The Everlasting Righteousness, p. 58)