This tells the would-be follower of Christ that the Christian commitment is a serious one and cannot be entered into half-heartedly. It also establishes a requirement for following Christ: self-denial. Self-denial is an act (or a series of acts becoming habitual). If to follow Christ it is necessary to deny oneself, and if following Christ is necessary for salvation (which it is), then self-denial is necessary for salvation. Since self-denial is a work, then at least this work is necessary for salvation. Consequently, the proposition “Faith alone” fails.
The sacrificing of Isaac and the will not to deceive, not even oneself are concepts that seem contradictory in the universal yet are paradoxical in faith.
their conclusion as to what it means to have faith in oneself is ..
Any non-Catholic who tries to parrot the Catholic position by claiming that we believe man can “save himself” is dishonestly setting up a straw man. He is also confounded by numerous Church documents (both ancient and recent) including texts of the Council of Trent, which clearly show that Faith, coming to us through God’s grace, is necessary before man can do anything in relation to his own eternal salvation.