A Puritan Catechism

This is an excellent resource for sanctification through the Word of God.

While I don't concur with all of Spurgeon's theological views - he was an adamant Calvinist and held to a questionable eschatology - I do find his writings, and particularly his sermons, to be as relevant and fresh today as they were when he penned them well over one hundred years ago.

A Christian ought to know what he believes and why he believes it and his beliefs must be based solely upon the bedrock foundation of the Word of God.