1 Corinthians 15:56 Meaning

54So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.

55O death, where is thy sting? O grave, where is thy victory?

56The sting of death is sin; and the strength of sin is the law.

57But thanks be to God, which giveth us the victory through our Lord Jesus Christ.

58Therefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labour is not in vain in the Lord.