In this sermon, the speaker emphasizes the importance of sharing the great things that the Lord has done for us and the potential for effective evangelism. The psalmist in Psalm 96 invites the whole world, including families, to ascribe glory and strength to the Lord. The use of music as an evangelistic tool is highlighted, as it can attract people and express the work of the Lord. The speaker also emphasizes that the Lord deserves to be praised, as all other gods are mere idols.