‘Ā’ishah (may Allah be pleased with her) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Verily, kindness is not to be found in anything but it adorns it, and it is not removed from anything but it makes it defective."
شرح الحديث :
A kind, gentile and compassionate person accomplishes what he needs to or at least part of it (in nice pleasant manner), while a violent and coarse person does not accomplish it, and even if he does, he does so with trouble and hardship.