Some with whom you are brought in contact may be rough and uncourteous, but do not, because of this, be less courteous yourself. He who wishes to preserve his own self-respect must be careful not to wound needlessly the self-respect of others. This rule should be sacredly observed toward the dullest, the most blundering. What God intends to do with these apparently unpromising ones, you do not know. He has in the past accepted persons no more promising or attractive to do a great work for Him. His Spirit, moving upon the heart, has roused every faculty to vigorous action. The Lord saw in these rough, unhewn stones precious material, which would stand the test of storm and heat and pressure.—Gospel Workers, 122.