Spurgeon on Perseverance of the Saints

Awhile ago, I wrote on pastors de-converting into atheism. This passage from All of Grace provided some insight into that.

"I believe that this fear is often the father of the fact; and that some who have been afraid to trust Christ for all time, and for all eternity, have failed because they had a temporary faith, which never went far enough to save them. They set out trusting to Jesus in a measure, but looking to themselves for continuance and perseverance in the heavenward way; and so they set out faultily, and, as a natural consequence, turned back before long. If we trust to ourselves for our holding on we shall not hold on. Even though we rest in Jesus for a part of our salvation, we shall fail if we trust to self for anything. No chain is stronger than its weakest link: if Jesus be our hope for everything, except one thing, we shall utterly fail, because in that one point we shall come to nought. I have no doubt whatever that a mistake about the perseverance of the saints has prevented the perseverance of many who did run well. What did hinder them that they should not continue to run? They trusted to themselves for that running, and so they stopped short. Beware of mixing even a little of self with the mortar with which you build, or you will make it untempered mortar and the stones will not hold together. If you look to Christ for your beginnings, beware of looking to yourself for your endings. He is Alpha. See to it that you make Him Omega also"