Nothing is so beneficial as a true knowledge of ourselves, which produces a wholesome self contempt. Always think kindly of others, while holding yourself as nothing; this is true wisdom and leads to perfection.
If you see another commit a grevious sin, or whose faults are flagrant, do not regard yourself as better, for you do not know what you would do if similarly tempted. You are in a good dispositoin now, but you do not know how long you will persevere in it. Always keep in mind that all are frail, but not so frail as yourself.
3 Let nothing be done through strife or vainglory; but in lowliness of mind let each esteem other better than themselves. 4 Look not every man on his own things, but every man also on the things of others. Philippians 2:3-4 KJV