A.W. Tozer emphasizes the contrast between Moses' lack of eloquence and God's power, illustrating that God often chooses the weak and humble to accomplish His purposes. Despite Moses' self-doubt and speech impediment, it was he, not his eloquent brother Aaron, who led Israel and authored significant biblical texts. Tozer points out that true depth of emotion often results in simplicity of expression, as seen in the poignant brevity of 'Jesus wept.' This sermon encourages believers to recognize their weaknesses as opportunities for God's strength to shine through.