Calvin: "nothing which relates to God can be known aright but by faith."
Commentary on John 17:6-11.
JC Ryle: "Our entrance into heaven will be entirely by grace, and not of works; but heaven itself would be no heaven to us if we entered it with an unsanctified character.... He who despises holiness, and neglects good works, under the vain pretence of giving honour to justification by faith, shows plainly that he has not the mind of Christ."
Expository Thoughts on the Gospels, v.4, pg 442.36