It was … singlehearted purpose to win the race for eternal life that Paul longed to see revealed in the lives of the Corinthian believers. He knew that in order to reach Christ’s ideal for them, they had before them a life struggle from which there would be no release. He entreated them to strive lawfully, day by day seeking for piety and moral excellence. He pleaded with them to lay aside every weight and to press forward to the goal of perfection in Christ.
Paul pointed the Corinthians to the experience of ancient Israel, to the blessings that rewarded their obedience, and to the judgments that followed their transgressions. He reminded them of the miraculous way in which the Hebrews were led from Egypt under the protection of the cloud by day and the pillar of fire by night. … By these acts God had acknowledged Israel as His church. … The Hebrews, in all their travels, had Christ as a leader. The smitten rock typified Christ, who was to be wounded for men’s transgressions, that the stream of salvation might flow to all.