John Gills Exposition of the Bible Commentary - Romans 12:15
Rejoice with them that do rejoice ,.... Not in anything sinful and criminal, in a thing of nought, in men's own boastings; all such rejoicing is evil, and not to be joined in; but in things good and laudable, as in outward prosperity; and to rejoice with such, is a very difficult task; for unless persons have a near concern in the prosperity of others, they are very apt to envy it, or to murmur and repine, that they are not in equal, or superior circumstances; and also in things spiritual,... read more
William Barclay's Daily Study Bible - Romans 12:14-21
12:14-21 Bless those who persecute you; bless them and do not curse them. Rejoice with those who rejoice, and weep with those who weep. Live in harmony with one another. Keep your thoughts from pride; and never refuse to be associated with humble people. Don't become conceitedly wise in your own estimation. Never return evil for evil. Take thought to make your conduct fair for all to see. If it is possible, as far as you can, live at peace with all men. Beloved, do not seek to revenge... read more