Sin, regeneration, justification by Christ's righteousness, the cross and the love of God, assurance of salvation--these are the truths that once thrilled churches and changed nations. They are the message that "turned the world upside down". Yet where evangelism continues to affirm these truths, without such results, it is often assumed that she must have new needs that cannot be met without something new. Hence the call for change, and such words as "mere doctrine is not enough". These addresses by Lain Murray challenge that mindset. He shows that biblical truths are never "mere". Where they have ceased to move and astonish it is because they have ceased to be rightly believed. Doctrinal recovery is the first need. While the Bible, not history, is the textbook in these pages, Murray draws on the best authors of the old evangelism to confirm what a stupendous message the gospel truly is. Here are the fundamental, life-changing truths that will remain the power of God unto salvation to the end of time.