48. Do not rejoice in temporal prosperity, because you do not certainly know that your eternal life is secure. 49. Though a man prosper in all his undertakings, and though every wish of his heart may be gratified, he ought in such a case to fear rather than rejoice; for this multiplies the occasions of forgetting God, and the risks of offending Him. 50. Do not presume upon vain joy; knowing how many and how grievous are the sins you have committed, and not knowing whether you are pleasing unto God.