The sermon examines the biblical figure Eleazar, one of King David's three mighty men, to illustrate the call for steadfast faithfulness in spiritual warfare. By analyzing passages from 2 Samuel and 1 Chronicles, the message highlights Eleazar's refusal to flee when others retreated, emphasizing his commitment to stand beside his king and protect the harvest. This historical account serves as a metaphor for the Christian's daily battle against sin and opposition, urging believers to remain close to Jesus Christ. The preacher challenges the audience to maintain their spiritual ground with tenacity, ensuring they do not grow weary in well-doing. Ultimately, the message asserts that enduring faithfulness leads to divine victory and preserves the truth for future generations.